BYTHimJS ATOMtJS. 


145 


NOTE XII. 

THE PSELAPHIDAE AND SCYDMAENIDAE PROM THE 
SUNDA-ISLANDS IN THE LEYDEN MUSEUM. 

BY 

Dr. L. W. SCHAUFUSS *)- 


JPselaphitlae , 

1. Bythinus atom.uS) n. sp. 

Rufo-testaceus, pubescens, abdomine castaneus, breviter 
obovatus; capite cum oculis triangulari; tborace rotundato- 
subcordato, major© quam caput; elytris caput thoracemque 
longitudine aequantibus, latioribus, striis suturali integra, 
discoidali ad mediam partem obsoleta; abdominis segmentis 
prirno et quinto latioribus, subaequalibus, 2—4 angustis; 
femoribus clavatis. — Long. 3 /. mm., lat. fere 1 / 4 mm. 

Hab, Batavia (de Gavere and Sijthofl). — Not rare. 

Eyes large, prominent, black, coarsely granulate. — 
Maxillary palpi: the terminal joint as long and half as 
thick as the breadth of the eyes, short-oval, slightly acu¬ 
minate , pale yellow. (Unfortunately I cannot make a more 
careful examination of the few and partly imperfectly pre¬ 
served specimens. It is not impossible that I have over¬ 
rated the size and the thickness). — Antennae: joint 1 
and 2 large, globose, 3 to 7 very small, moniliform, 8 

twice as broad as thick, broader than 7; 9 and 10 trans- 
\> 


1) See also Tijdschrift voot Entomologies Vol. XXV. p. 65, 

Notes from the JLioyden Museum, Vol. IV. 



146 


MNAPHANTUS SQUAMICEPS. 


verse, 10 broader than 9, 11 very thick and large, short- 
oval, more than four times as broad and five times as 
long as 3. — The femora, especially those of the intermediate 
legs, are strongly swollen at the basal third. — The coxae 
are sub-contiguous, those of the hind legs very large, 
occupying two fifths of the breadth of the abdomen. — 
There are five abdominal segments; the first and fifth are 
very broad, the latter broader than the former, the 2nd to 4th 
narrow, when taken together they are as broad as the first. 

This species seems to be allied to the genus Cercocerus 
Motseh.; the palpi are somewhat too stout and too long 
for the genus Bythinus. 

2. Panaphantus s quamicep $ , n. sp. 

Rufo-sanguineus, nitidus, ochraceo-pilosulus, segmentis 
abdominalibus supra et subtus, elytris posticis, thoracis 
foveola lateribusque dense squamosis; capite subrotundato, 
apice porrecto, opaco, ruguloso, ochraceo-pilifero, inter 
oculos triimpresso subcanaliculatoque; thorace subeordato, 
antice subconstricto, nitido, supra laxe cribrato-punctato; 
elytris parum convexis, postice dilatatis, nitidis, quadri- 
striatis, interstitiis suturali seriatim, reliquis disperse pune- 
tulatis piliferisque. — Long. 1 l j % mm., lat. */ 3 mm. 

Hab. Batavia (Sijthofi), — Common. 

Antennae as long as the head and prothorax taken to¬ 
gether, approximate, inserted under a projection which is 
placed before and between the eyes. The Grst joint twice 
as long as broad, cylindrical, the 2nd as thick as the 
first, quadrate, the 3rd to 7th a little narrower, moniliform 
but nevertheless broader than long, the 8th and 9th hardly 
broader, the 10th and 11th forming a club, the 10th al¬ 
most as broad as the length of the first, the 11th three 
times as long as ant} nearly one half broader than the 
10th. — Maxillary palpi very small, filiform, slightly dila¬ 
ted towards the tip, the two apical joints together scar¬ 
cely as long as the 2nd antennal joint, and four times as 

fsTotes from the Leyden Museum, "Vol. IV. 



ZETrtUS BATAVlAtfUS. 


447 


long as broad, bluntly acuminate at the tip. — Eyes very 
large, coarsely granulate. — Head densely squamose, opa¬ 
que, impressed between the eyes. — Thorax inversely 
heartshaped, contracted in front superiorly as well as la¬ 
terally, provided before the scutellum with a large groove 
which is densely tomentous as are the margins; glossy, 
distantly covered with small round s pits. — Elytra: the 
sides nearly straight, widened towards the end, the angles 
rounded. The sutural stria entire, impressed at the base, 
the dorsal stria slightly curved inwards at the end. Along 
the suture, between this and the sutural stria, a row of 
punctures is present, the other intervals are distantly, 
nearlj serially punctured and similarly beset with short 
and thick erect yellow hairs, which are more closely set 
on the sides and on the hindborder. The insect has whitish 
wings which are faintly transparent. — The abdominal 
segments are, above and beneath, densely margined at the 
base with yellowish white; behind the base erect white 
hairs are present which are less close together. — The 
femora are hardly thickened, slightly convex above. Those 
of the intermediate legs at the tip provided with a spine, at 
the base somewhat concave. —The first tarsal joint dis¬ 
tinctly separated, small, as long as broad, the succeeding 
ones lepismatiform; the claw simple. 

I have classed this species in the genus Panaphantus , 
although the shape of the palpi does not agree with the 
figure given by von Kiesenwetter; the diagnosis: »palpi 
max. art. penult, parvo, ult. ovato, subacuminato” admits 
of very numerous and varied interpretations. 

3. Zethus latavianus , n. sp. 

Brunneus, cribrato-punctatus, breviter disperse pilosus, 
ore pedibusque testaceis, elongato-obovatus; capite trans- 
verso, apice subtus rotundato, ante basin leviter curvato-, 
medioque lineota abbreviata impresso; elytris subquadratis, 
antice parum angustatis, lateribus rotundatis, cribrato- 

Notes from the Leyden Museum, Vol. IV. 



148 BRYAXIsI SIAMENSIS. 

punetatis, striis suturali Integra, cliseoidali ad basin solum 
notata; abdominis segmentis tribus primis'subaequalibus, 
convexis. — Long. l ! / 3 mm., lat. fere */ 2 mm. * 

Hab. Batavia (Sijthoff). — Not abundant. 

Neck closely punctured, gullet with a longitudinal chan¬ 
nel, the chin convex, impressed anteriorly, provided on 
both sides with a callosity before which small setae are 
present; underlip twice as long as broad, emarginated in 
a curvilinear manner on both sides. The lateral longitu¬ 
dinal groove of the head, in which the maxillary palpi are 
lodged, is better visible from below than from above. The 
upperlip is broad; it has rounded angles and projects over 
the .underlip in roofshape. — The intermediate coxae are 
large, nearly globose, and as well as the anterior ones 
contiguous; the posterior coxae are oblong, plain, sub- 
contiguops. — Wings are present. — The abdominal seg¬ 
ments margined. 

Differs from Z, opacus Schauf. by the elytra which are 
convex, and rounded at the sides, by the abdomen which 
is somewhat widened towards the end, by the head which 
is larger and rounded in front, and finally by the size. 

4. Bryaxis siamensis , Schauf. 

(Schaufass, Pselaphiden Siam’s. Dresden, 1877. p. 9). 

Abundant in Java: East Java (Mulie); Batavia (de Ga- 
vere and Sijthoff). 

To the description, which was made at the time from 
a unique specimen, I may now add the following: 

Above the insertion of the antennae are two small tu¬ 
bercles behind which an oblique shallow impression which 
is directed backwards, may be observed. The shining lus¬ 
tre behind the tubercles may easily lead to the assumption 
that an impression is present: this is however an optical 
illusion in the majority of the cases, as I only succeeded 
in finding a real small pit in two specimens. — The llfch 
antennal joint is the largest, short, inversely ovate, slightly 
acuminate; the penultimate, one nearly globose, the first 

JN'otes from the Leyden Museum, Vol. IV\ 



EUPLECTUS ACUM1NATUS. 


149 


and 2nd somewhat longer than broad, but little stouter 
than the succeeding ones. 

The male shows on the middle of the head sometimes 
a very shallow small groove. The metasternum is widely- 
and deeply-, the fourth abdominal segment deeply-impres¬ 
sed; the first abdominal segment is broad, notched in the 
middle. 

The female shows only a feeble impression on the me¬ 
tasternum; the abdominal segments have no peculiar cha¬ 
racteristics. * 

The Javan individuals have the thorax somewhat wider 
than my type specimen from Siam. In many specimens the 
base of the thorax, the suture as well as the abdomen are 
slightly brownish. 

5. Bryaxis cordate e], Schauf. 

(Scliaufuss, Pselaphiden Siam’s. Dresden, 1877. p. 9). 

Very common in Java. 

A well preserved specimen from Batavia (Sijthoff) shows 
a richer pubescence on the elytra and on the thorax which 
makes it appear opaque. In many specimens a small oblong 
groove may be observed on the vertex; this groove is much 
smaller than the three other cephalic grooves. — 'The first 
abdominal segment has on the uppersurface on both sides 
a transverse line (longitudinal when seen from above). 

The milkwhite opalescent wings are longer than the 
insect. * ' 

6. Bryaxis Fonensis , Schauf. 

(Schaufuss, Pselaphiden Siam’s. Dresden, 1877. p. 10). 

A single specimen from Batavia (Sijthoff). 

When it is full coloured the insect has brighter tarsi, 
antennae and palpi. 

7. Euplectus dcuminatus , n. sp. 

* Rufo-ferrugineus, disperse punctulato-pilifer; capite an- 
tice curvato impresso, medio elevato; thorace obcordato, 

Notes from the X^eyden Museum, Vol. IV. 



150 


BATRISUS RITSEMAE. 


profunde trifoveolato, foyeolis linea supra basin conjunetis, 
antice medio longitudinaliter linea impressa, basi emargi- 
nata, angulis posticis excisis, lateribus breviter unispinu¬ 
losis; elytris quadratis, subconyexis, fere lineatim disperse 
punctulato-piliferis, striis suturali integra, discoidali apice 
evaneseente; segmentis abdominis tribus primis aequalibus, 
utrinque medio plicatuliformiter impressis. — Long, V/ e mm., 
lat. */- mm. ^ 

Hab. Batavia (Sijthoff). — Appears to be rare. 

Maxillary palpi: the terminal joint as long as the termi¬ 
nal joint of the antennae and as broad as one third of 
its own length, acuminated towards the tip. — The club 
of .the antennae 3-jointed. The first and 2nd joints of 
the antennae thickened, 3rd to 8th moniliform, a little broa¬ 
der than long, 9 strongly transverse, one half broader 
than long, 10 broader than 9, short, conical, nearly as 
broad as 11. — The head is provided with a deep horse- 
shoe-shaped impression of which the convexity is directed 
forwards and the sides grooved behind. — By the emar- 
gination of the hind angles of the thorax a small acute 
spine is formed before the middle of the lateral margins; 
the external hind angles of the elytra are acute. — The 
abdomen is not margined, smooth beneath, distantly punc¬ 
tured at the borders, the punctures beset with rather long 
decumbent hairs., — The hind coxae are not contiguous; 
I must for the present suspend my judgment as to the 
question whether this may authorize us to place this in¬ 
sect in the genus Philus. 

8, Batrisus Ritsemae , n. sp. 

Castaneus, nitidus, longe ochraceo-hirsutus,‘ amplus, ab¬ 
domen cum elytris breviter ovalibus, convexis; antennis 
robustis, moniliformibus, articulis tribus ultimis parurn ma- 
joribus , non clavatis; capite inter et post antennas im- 
presso; thorace rotundato-cordato, basi plicatim-foveolato 
et curvatim-impresso; humeris parurn sed distincte promi- 
nulis; tibiis eurvatis, anticis fere angulatis. — Long. l*/ 5 mm., 
lat. fere 1 mm. 

Notes from the Leyden Museum, Vol. XV. 



BATRISUS FUNDAUBRACCATUS. 


151 


Hab. Sumatra: Benkoelen (Leembrugge). — Not rare. 

The 1 basal impression of the thorax sends towards the 
scutellum an impressed line, whereas the base itself is im¬ 
pressed by several pits. — The elytra are very finely and 
distantly punctured, glossy, and, as well as the whole in¬ 
sect, very densely covered with erect long hairs. 

The insect would belong to Motschulsky’s genus Har - 
mophorus ') (to the further consolidation of which 1 do 
not however wish to contribute as yet), when the Author 
had not written: »la forme du corselet rapproche ce genre 
des Centrophthalmus et des Tyrus'\ which is not well ap¬ 
plicable to B . Ritsemae . The terminal joint of the maxil¬ 
lary palpi is very fine, setiform. The rest agrees. 

Dedicated to Mr. C. Ritsema Cz., who has kindly sent 
me in communication the Pselaphidae and Scydmaenidae of 
the Leyden Museum. 

9. Batrisus fundaebraccatus, n. sp. 

Rufo-sanguineus, nitidus, disperse ochraceo-pilosellus; 
femoribus posticis apice valde clavatis, cavatis, Cavea ex- 
tus dentata; capite inter antennas impresso , inter oculos 
bifoveolato, fronte lineola longitudinali impresso’; thorace 
valde cordato, longitudinaliter tri- et basi impresso, foveis 
tribus conjunctis, basi utrinque plicato; elytris pilosulis, 
subquadratis, subconvexis, antice rotunclatis, humeris vix 
spinulose prominentibus, striis suturali discoidalique dis- 
tinctis; abdominis segmento primo maximo, basi utrinque 
minute plicatuliformiter impresso. — Long. Vj 2 mm., lat. 
2 / 3 mm. 

Hab. Batavia (Sijthoff). — Not abundant. 

This species is well characterized by the strongly swol¬ 
len hind femora (cT?) which are hollowed out, and provi¬ 
ded at the margin of the opening of the cavity with one 
or more small teeth. 

. The antennae are a little longer than the head and tho- 


l) Bulletin de Moscou. 1851. Separate copy p. 12. 

Notes from the Leyden Museum, Vol. IV. 



452 


BATfUSUS SCULPTURATUS. 


rax taken together. The first joint is stout, nearly qua¬ 
drangular, the 2nd hardly larger than one of the joints 
3—7 which are moniliform, joints 8—11 form a loosely 
coherent, but little thickened club. 

The thorax has a small spine on each side posteriorly, 
similar to that on the shoulders but more distinct. ' 

10. Batrisus s culpturatus , n. sp. 

Gastaneus, nitidus, ore pedibusque testaceis, obsolete 
disperse punctulatus, pilifer; capite quadrato, angulis pos- 
ticis rotundatis, inter oculos bifoveolato, inter antennas 
biimpresso; thorace cordato, subtiliter punctulato, basi 
utrinque dense punctato foveolatoque, utrinque longitudi- 
naliter et supra basin linea impressa; elytris nitidis, dense 
punctato-pilosis, striis suturali et discoidali apice evanes- 
centibus, interstitiis convexis, humeris distinctis; abdominis 
segmento primo supra utrinque valde exciso et medio utrin¬ 
que minute dentato, intus utrinque sculpturato, apice medio 
‘ cornutulo. — Long, fere 2 mm., lat. 3 / 4 mm. 

Hab. Java or.: Ardjoeno (Hekmeyer). — A single spe¬ 
cimen. 

The first joint of the palpi is as long as or longer than 
the 3rd, thin, slightly thickened from the middle towards 
the tip, a little curved; the 2nd joint small, triangular, 
longer than broad; the 3rd joint has the shape of an elon¬ 
gate parallelogram. The palpi are still brighter than the 
tarsi. — The antennae are long and slender, beset with 
setae, each joint clearly separated, the first thickened, lon¬ 
ger, than broad, emarginated superiorly in front, obliquely 
truncated forwards and outwards forming a point at one 
side only,* joints 2—8 one and a half to twice as long 
as broad, gradually increasing in length, 9 and 10 thic¬ 
ker, larger, oval, 11 two thirds of the length of joints 
9 and 10 taken together, nearly oval, acuminate.— Head 
slightly impressed longitudinally between the antennae and 
provided with two grooves between the eyes. — Thorax 
heartshaped, shallowly and dispersedly punctured and be- 

Notes from the Leyden Museum, "Vol. TV • 



ENOPTOSTOMUS JAVAN US. 


453 


set with setae; on the sides there is a longitudinal impres¬ 
sed line which is directed towards the hind angles; from 
there an impressed transverse line runs along the. base; 
this line is very shallow in the middle and bends towards 
a small groove before the scutellum. — The elytra together 
with the abdomen form an oval which is shortened ante¬ 
riorly and posteriorly; both are closely punctured, convex; 
the last segment occupies when seen from above the whole 
abdomen; it is deeply notched on both sides, truncated in 
the middle superiorly, the truncation provided on both 
sides with small teeth, and inferiorly to the notch on both 
sides (inwardly) a few deeply impressed lines are present. 
These lines are directed backwards, whereas posteriorly 
they show a small tubercle in the middle. 

I could not venture the risk of further researches upon 
the unique specimen. 

11. Centro phthalmus quadristriatus , Schauf. 

(Schaufuss, Pselaphidcn Siam's. Dresden, 1877. p. 22). 

Batavia (Sijthoff); Java or. (Mulie). — Not rare. 

12, Centro phthalmus punctipennis, Schauf. var. 

punctatissimus , Schauf. 

(Schaufuss, Pselaphiden Siam’s, Dresden, 1877. p. 22). 

A specimen from, Batavia (de Gavere) which is in a much 
better condition than my type specimen. The insect is 
rather densely covered with hairs above and beneath. The 
terminal joint of the antennae is globose. 

13. Enoptostomus javanus , n. sp. 

Rufo-testaceus, subopacus; antennarum clava fere cylin- 
drica, dimidia antennarum longitudine; capite inter oculos 
bifoveolato; thorace subgloboso, antice constricto, basi 
unifoveato; elytris subnitidis, breviter ochraeeo-piliferis, 
postice dilatatis, '* striis suturali et discoidali integris, ad 
basin profunde impressis, apice et segmentis abdominali- 

Notes iron* the X^eyclen Museum, Vol. IV. 

11 



454 


CTENISTES MIT1S. 


bus primis basi dense ochraceo pilosis. — Long* l ! / 3 mm., 
lat. Vs mm.; antenn. long. % mm. 

Hab. Java (Raadt). — Rare. 

Maxillary palpi: the 2nd joint renifortn, narrower than 
the 3rd, provided on the outside with a fine hair, poste¬ 
riorly bent inwards, narrowed; the 3rd joint a little lon¬ 
ger than the 2nd, the elongate lateral point from tip to 
base as long as the are before it; the 4th joint not lon¬ 
ger than the 2nd, triangular, the elongate lateral point 
but short. — Antennae: the first joint a little longer than 
broad, the 2nd quadrate, the 3rd—7th smaller, globose, 
8th—11th cylindrical, hardly widened towards the tip; 
9th and 10th, which are obliquely truncated, shorter 
than the 8th or 11th, the apical joint rounded at the 
tip. — The head with the large prominent eyes wider 
than long, strongly , narrowed before the eyes, wide¬ 
ning out again behind the insertion of the antennae, — 
The femora hardly thickened, the tibiae a little wider to¬ 
wards the end, but little curved. — The anterior coxae 
but little, the posterior ones considerably distant. 

Differs from the Enoptostomi with which I am acquain¬ 
ted (Aubei, opacus Schauf., ponticus, siamensis Schauf.) by 
the cylindrical club of the antennae. 

14. Ctenistes mitis , n. sp. 

Elongato-obovatus, pallidus, ochraceo-adpresse-pilosulus, 
thorace antice bi-, basi tri-alboplagiato, elytris apice, seg¬ 
ments abdominalibus basi tenuiter albomarginatis; capite 
(sine oculis) elongato, inter, oculos bifoveolato, inter anten¬ 
nas longitudinaliter impresso; thorace elongato, antice sub- 
angustato, convexiusculo, pilis brevibus divergentibus prae- 
dito; elytris postice parum dilatatis, leviter convexis, pilis 
ochraceis adpressis, striis suturali integra, discoidali apice 
evanescente. 

cT antennis 4 /$ corporis longitudine, articulis quatuor 
ultimis % antennarum longitudine, 3—7 minutis, monili- 
formibus, 8, 10, 11 inter se longitudine aequalibus, nono 

Isfotes from the Leyden Museum, "Vol. rv\ 



EUMICRUS EPOPSIMUS. 


155 


parum octavo breviore. — Long, fere l 2 / 3 mm., lat. 2 /3 mm. 

Hab. Batavia (Sijthoff). — A single specimen. 

Eyes large, coarsely granulate, black, prominent. — 
Wings hyaline, milkwhite. — Legs long, tibiae straight, 
anterior femora hardly thickened, the posterior ones in 
the middle club-shaped. 

Somewhat smaller and narrower than Gt palpalis Reichb., 
of a pale ferrugineous-yellow colour, the antennal club 
longer in the cT, the abdominal segments but narrowly 
edged with whitish hairs. Only the suture and antennal 
club are a little darker coloured than .the rest of the 
insect. * 


Scydmaenidae . 

15. Eumicrus epopsimus , n. sp. 

Rufus, antennis pedibusque rufo-testaceis, disperse ochra- 
ceo hirsutulus, parum convexus; antennis 11-articulatis, 
clava biarticulata; capite subquadrato, angulis posticis ro- 
tundatis; tkorace latitudine longiore, lateribus medio ro- 
tundatis, antice angustatis; elytris obovatis, disperse punc- 
tulatis, humeris distinctis; femoribus parum clavatis, tibiis 
rectis, ad apicem vix dilatatis. — Long. 1 mm., lat. V 3 mm. 

Hab. Batavia (de Gavere). — Rare. 

Joints 3—6 of the antennae hardly longer than broad, 
7 and 8 not broader, small, quadrate, 9 similar but one 
half thicker, 10 and 11 twice as thick, forming a stout 
club of two fifths of the length of the antennae; joint 9' 
although thicker than 8 cannot be regarded as belong¬ 
ing to the club, — The elytra are remotely punctured 
and beset with very fine hairs; on the head and thorax 
a fine almost imperceptible punctuation is also present. — 
The anterior coxae are nearly contiguous, the hind ones 
distant. — The metasternum is almost as large as the 
abdomen. 

Differs from Scydmaenus alatus Nietn., which belongs 
to the genus Eumicrus , by its size and colour, by th e 

Notes from the Leyden Museum, Vol. IV, 



456 


SCYDMAEN13S PYRIFOftMIS. 


punctuation of the elytra, and moreover by the shape of 
the two apical antennal joints, these being of equal width. It 
is however allied to that species by the two-jointed an¬ 
tennal club. * 

The eyes are not prominent.— The prothorax is broadly 
heart-shaped, elongated anteriorly, in other words: longer 
than broad., the sides are strongly rounded, more narro¬ 
wed in front than behind. 

16. Scydmaenus pyriformis , Nietn. 

(Ann. and Mag, of Nat. Hist. 2nd Ser. Vol. XX (1867). p. 188). 

(s= brunnipennis Motsck Etud. ent. 1858. p. 30). 

. Rufus, antennarum articulis tribus ultimis obscurioribus, 
pedibus pallidis, longius disperse hirsutus; antennarum ar¬ 
ticulis 1—8 tenuibus, primo et secundo elongatis, 3—8 
moniliformibus, clava triarticulata, nono et decimo globo- 
sis, undecimo obovato; capite majore, convexo, subqua- 
drato, lateribus ad apicem parum angustatis*, angulis pos- 
ticis rotundatis; thorace hirsutulo, parum latitudine longiore, 
antiee rotundato-ampliato, angulis posticis subrectis, basi 
leviter rotundata, linea utrinque plica abbreviata impressa, 
medio profunde bi-foveolato; elytris ovatis, lateribus ro¬ 
tundatis, sutura antiee, basi utrinque impressis, supra dis¬ 
perse punetatis, hirsutulis; femoribus subelevatis, obscurio¬ 
ribus. — Long. 1 nun., lat. 4 / 5 mm. 

Hab. (Ceylon); Java (Raadt); Batavia (Sijthofl). — Very 
common. 

Both the small grooves in the basal line of the thorax 
are less deep and wide in the specimens from Batavia than 
in certain other specimens, which only bear the general 
indication of habitat: Java. The little fold, by which 
the basal line is bounded on both sides near the hind an¬ 
gles of the prothorax, is almost imperceptible. 

The head in the female is somewhat more rounded pos¬ 
teriorly. 

This species is easily recognized by the very remotely 

Notes from the I^eyden Museum, V“ol. IV. 



SCYDMAENUS PYRIFORMIS. 15 1 

punctured elytra; these as well as the prothorax, perhaps 
also the head, are beset with long yellow glossy hairs, 
which are somewhat decumbent and quite as distant as 
the punctuation of the elytra, , 

Ober-Blasewitz near Dresden, December 13th, 1881. 


Notes from the J^eyden Museum, "Vol. IV*. 



