Dyschirius (Eudyschirius) interior
Distribution: Native, New World. Canada – AB, MB, SK; USA – AZ, CA, CO, ID, NE, NM,
NV, TX, UT, WY.
Common name: Interior Discolored Beetle
Synonyms: Dyschirius interior Fall, 1922:172
Dyschirius arizonicus Van Dyke, 1943:22
Macrohabitat: Lowlands (below sea level) to mountains, -86 – 2621 meters
altitude, on margins of lakes, ponds, rivers, and brooks in the praires. Microhabitat: Adults
are ground-dwelling on exposed bare sandy, saline or alkaline substrate. Dispersal abilities:
Macropterous, capable of flight; slow runner and strong burrowers. Seasonal occurrence:
Adults have been found in April, and June – September; teneral adults in mid-July (AZ). Behavior:
Adults are nocturnal, predaceous, and take cover during the day in burrows they dig.
Populations of this species are associated with staphylinids (Bledius ssp.). Adults are occasionally
attracted to UV lights. Adults overwinter in the substrate.