Dyschirius (Paradyschirius) quadrimaculatus
Geographic: NEA
Distribution: Native, New World. Canada – AB, MB, SK; USA – ID, MT, ND, WY.
Common name: Four-spot Discolored Beetle
Synonym: Dyschirius quadrimaculatus Lindroth, 1961:148
Macrohabitat: Midlands, 575 – 987 meters altitude, on the upper litoral zone
of river banks and lake shores. Microhabitat: Adults are ground-dwelling on exposed, steep,
wet sand-mixed clay substrate, bare or with sparse vegetation (e.g., Equisetum spp.). Dispersal
abilities: Macropterous, probably capable of flight; slow runners, strong burrowers. Seasonal
occurrence: Adults have been found in May – July, and September; teneral adults in early
July. Behavior: Adults are nocturnal, predaceous, and take cover during the day in burrows
they dig into the substrate; they are gregarious. Populations of this species are associated with
staphylinids (Bledius ssp.). Adults overwinter in the substrate.