Trimerotropis pistrinaria is found in the eastern two-thirds
of Wyoming and is probably absent from the desert southwest. It prefers
dry prairie sites with barren or eroded soil. Eggs overwinter in the soil.
Adults were present from mid July through August. It is a mixed feeder
and is known to prefer milkvetches (Astragalus) and other forbs.
It is rarely abundant and is not known to significantly affect plants on
Ref: Otte 1984, and Capinera and Sechrist 1982.