Woodland Ground Beetle
Pictorial Key
Family: Carabidae
Subfamily: Carabinae:
Tribe: Pterostichini
Genus: Pterostichus
Size: 6mm-11mm
Threadlike Antennae
The carabidae family of beetles is the third largest in North America with about 150 genera and 1700 species and have several distinctive characteristics. The hind coxae divide the first abdominal segment, and the threadlike antennae (occasionally beadlike) are inserted in between the eyes and the forward pointing mandables. Most Carabidae beetles are black and long legged with shiny, striate elytra. Species range from 1-35mm. They can be found, as their name implies, on the ground. They are active at night and can be found under objects during the day. Most ground beetles feed on small insects.

The Pterostichini tribe is a member of the Carabinae (to which the vast majority of ground beetles belong) subfamily. 150 Pterostichinids, ranging from 7-24 mm. belong to the Pterostichus genus. They occur in moist logs or wet ground and are very widely distributed in all climates, from frozen tundra to semitropical southern United States.