Susan Ellis, Bugwood.org
Jeff Hahn, Department of Entomology, University of Minnesota
Size: Most are 1/8 - 3/4 inch long
Description: Flat, slender beetles with very short wing covers that expose most of the abdomen; most are black or brown.
Where/When: Typically found on the ground, under stones and leaves and in loose soil during spring and summer.
Significance: They are predators on other insects.