Beetle - Eleodes marginata

Moved

… Hisserdude, 21 June, 2017 - 12:23am

Eleodes (Discogenia) marginatus

… tenebboy, 21 June, 2017 - 12:22am

Def not Coelocnemis...

Moved tentatively to Eleodes, don't really see what else it could be, except maybe Neobaphion, but I doubt that.

Moved from Coelocnemis.

… Hisserdude, 7 January, 2017 - 2:33am

maybe not Coelocnemis

if it was really 1.5 cm, thats way too small for a Coelocnemis. Also I don't think they occur on the seashore. If you kept the bug, check its tarsi. If there are no golden setae (doesn't look it in the photo) then it isn't Coelocnemis. There are some eleodes that are this small and look like this. Even if not in the genus, Eleodes, pretty sure its at least in the tribe Eleodini.

… Kojun Kanda, 27 August, 2007 - 11:06pm

darkling beetle

we have an expert, he may tell more.

… Boris Büche, 25 May, 2007 - 6:36am

No expert here, but....

I am relatively certain this is a species of Coelocnemis (very wide thorax is typical of the large members of this genus).

… Eric R. Eaton, 25 May, 2007 - 12:09pm

darkling beetle

That genus isn't in the Peterson Field Guide series book on beetles. Could it be a name change? Maybe just the limitations of the book in a family with 180 genera. Do you have a beetle book you recommend?

… Wendy 10, 25 May, 2007 - 8:48pm

"Field Guide to the Beetles of California"

by Arthur Evans. (Also get a copy of his "An inordinate fondness for beetles", a really tasty coffee table book. I got it from my county library.)

Darkling is very common, at least locally. There are a couple of pages on them in "Kaufman Field Guide to Insects of North America", written by Eric R. Eaton.

… Ron Hemberger, 25 May, 2007 - 11:24pm

Seconded. I think yours is what is called a stink beetle here.

They stick their butt up in the air and spray to ward off attack. Here's one that looks like yours:

BTW, I'm no expert either, as you've probably gathered from my highly scientific explanation of behavior.

… Ron Hemberger, 25 May, 2007 - 12:59pm