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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Ground Beetles (Carabidae) » Brachininae » Bombardier Beetle (Brachinus)
Photo#1631445
Brachinus sp. - Brachinus
Copyright © 2019 Kyle J. Rossner

Brachinus sp. - Brachinus
Pomona / Stockton University, Atlantic County, New Jersey, USA
September 30, 2010
Size: 9mm
Collected in Malaise trap by W.J. Cromartie.

Keyed almost perfectly to Brachinus sublaevis Chaudoir in Terry Erwin's 1970 reclassification of bombardier beetles:

-Median raised portion of mentum with one or two setae
-Antennal articles 3 and 4, metepisterna, metasternum at sides, and abdominal sterna and terga infuscated
-Mesepisterna not darkly infuscated
-Dorsal surface and epipleura of elytra dull blue
-Proepipleura glabrous

The only thing I was uncertain about was the elytral costae and the extent to which they are visible, but Erwin's description states that the height of the costae varies within population samples.

-A RECLASSIFICATION OF BOMBARDIER BEETLES AND A TAXONOMIC REVISION OF THE NORTH AND MIDDLE AMERICAN SPECIES (CARABIDAE: BRACHINIDA) by Terry Lee Erwin, 1970

Images of this individual: tag all
Brachinus sp. - Brachinus Brachinus sp. - Brachinus Brachinus sp. - Brachinus
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Contributed by Kyle J. Rossner on 31 January, 2019 - 1:42pm
Last updated 31 January, 2019 - 7:29pm

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… Kyle J. Rossner, 31 January, 2019 - 7:29pm login or register to post comments

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