Carabidae, Coleoptera, Insecta, Arthropoda, Animalia
Matthew Denton, The Evergreen State College, Olympia, WA 98505 USA.
01 April 1997
| Genus key | species list | B. nigrinus
Identification
A heterogeneous genus containing small species (2.8-6.8mm), usually bicolored and with no pubescence on the upper surface of the body. Penultimate labial palpomere bisetose anteriorly; mentum with distinct tooth on anterior margin medially; pronotum with basolateral setae absent; elytron without short scattered setae laterally or apically; the eight posterior most umbilicate setae on ninth interval not distinctly divided into two separate groups of four setae; legs short; first segment of meta-tarsus always shorter than second and third together; last tarsal segment with at least one pair of bristles underneath, except in lecontei and badipennis group.
Range
Holarctic with a few species in the northern portion of the Neotropical region.
Natural History
Thirty species found in North America. Most species are primarily herbivorous, inhabiting open country.
References
Lindroth, C. H. 1961-1969. The ground beetles (Carabidae excl. Cicindelinae) of Canada and Alaska. Parts 1-6. Opuscula Entomologica xlviii + 1192 pp.
For information about this page: John T. Longino longinoj@evergreen.edu
Last modified: 04/01/1997