This genus is characterized by having a three-pronged structure, referred to as a fuscina, along the dorsal margin of the clypeus; this character is unique in the Hymenoptera...
[T]he head morphology suggests digging is involved at some point in its life history.
Also fun is a bibliography which can have these two listings together:
Buffington, M. L. 2011. Description, circum-scription and phylogenetics of the Diglyphosematini Belezin, 1961, and the description of a new genus (Hymenoptera: Figitidae: Eucoilinae). Proceedings of the Entomological Society of Washington 113: 239–290.
Lovecraft, H. P. 1928. The Call of Cthulhu. Weird Tales 11: 159–178, 287.