Calathus gregarius
Say, 1823
Calathus gregarius is a ground beetle in the Carabidae, first described by Thomas Say in 1823. It is native to North America, with confirmed records from Canada and the United States. The belongs to a large of more than 150 species, though most research on Calathus has focused on European and African representatives.

Pronunciation
How to pronounce Calathus gregarius: /kəˈleɪθəs ɡrɪˈɡɛəriəs/
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Images
Distribution
North America: Canada and the United States. GBIF records confirm presence in both countries.