Moths of North Dakota

Common name: No accepted common name, listed here as 'Riley's dart.'

Hodges #: 10669, under Onychagrotis..

Identification: Rfw 14.53 mm; fw gray, transverse lines black. Hw color whitish. All tibiae setose; protibial setae blunt, fossorial. Eyes without hair, frons with a raised ring.

Similar species: 10223, 10641, 10645,10704, 10705, 10715, 10780, 10813, 10845, and 10847 .

Distribution: dry, semi-desert areas of the Great Plains from southern Canada to Texas, westward to just beyond the front range of the Rockies..

Hosts: Larvae are unknown, however, in Severin-McDaniel Insect Research Museum (South Dakota State University) there are long series of collected adults from areas corresponding to damage atributed to A. orthogonia and it is possible that occasionally, this species may have been in part, responsible..

Note: The generic name Onychagrotis was based on the enlarged protibial setae of this species.

ND Williams Co., Williston, UV lt. trap.
9- IX- 1986. G. Fauske.

Protibiae of Agrotis rileyana (left) and A. orthogonia (right).