Hodges # 8738
Caterpillar foods: clover, grasses, lupines (Bugguide)
This species is often difficult to tell apart from Caenurgina erechtea in photos. I’ve done my best with these photos. The following characters can help to differentiate them:
C. crassiuscula is very brown, with a brownish ground color, and lack white edging to the outer margin of the PM blotch-line.
On male C. erechtea the AM line inner boundary is curved outward well before the inner margin. In C. crassiuscula it is pretty straight. (Jerry Fauske)