17 December

This subspecies is known across all of southern Canada and the northern United States (McPherson 1982). It is known from the northern part of the continent, whereas the other subspecies within Euschistus is known from the south. Seen in fields/grasslands.

Occurs on many different host plants: grains, fruits, flowers, grasses and trees (McPherson 1982). Under lab conditions this subspecies was observed feeding on the larvae of the cabbage butterfly, Pieris rapae (Culliney 1985). Thought to attack the larvae of the mountain-ash sawfly (McPherson 1982).