Omicron (wasp)
Omicron is a quite diverse Neotropical genus of small potter wasps. References

 Giordani Soika, A. 1978. Revisione degli Eumenidi neotropicali appartenenti ai generi Eumenes Latr., Omicron (Sauss. ), Pararaphidoglossa  Schulth. ed affini. Boll. Mus. Civ. Stor. Nat. Venezia 29: 1–420. Potter wasps