Elachista ossuaria
Elachista ossuaria is a moth of the family Elachistidae that is found in Alberta, Yukon, Arizona, Colorado, Montana and Wyoming. The length of the forewings is  and the forewing costa in the basal 1/6 is grey. The ground colour is unicolorous yellowish-white, while the hindwings are light grey, and the underside of the wings is grey. Etymology
The species′ name is derived from Latin ossuarius (meaning of bone). References

Moths described in 1997
ossuaria
Lepidoptera of the United States
Lepidoptera of Canada