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Ground Beetle - Cynaeus angustus

Ground Beetle - Cynaeus angustus
Brooklyn, Kings County, New York, USA
May 25, 2007
Size: ~5.5mm
Something in Harpalinae perhaps.

Images of this individual: tag all
Ground Beetle - Cynaeus angustus Ground Beetle - Cynaeus angustus

Moved from Darkling Beetles.

i hope the experts will chek & hopefully confirm
the fact that this bastard is not even in the same subfamily as the mealworms [from which it's visually indistinguishable] drives me crazy -- despite the fact that i learned by the age of 18 that deceptive looks is what this family is all about

Found several more images on Google. The best was a high quality image on a German website here.

The common names often used are "larger black flour beetle" and "large black flour beetle".

indeed-- nice picture!
do you know that that site is a one-man operation, and the guy has a day job [nothing to do with entomology] and takes pictures only of specimens he collects himself?

i may have solved this:
look at which is a clone of the MCZ type and looks very similar to your pix, too -- even has the same exact size!

ID confirmed by Warren Steiner:
"Yes, definitely Cynaeus angustus. Native to SW US but spread rapidly eastward with agriculture, grain storage, etc. and sometimes found under bark, hay bales & debris."

Then . . .
it probably is something new for the guide.

. . . but from the old world?
any chance this could be Alphitobius, possibly A. laevigatus? Looking through Downie and Arnett for this size and characteristics seems to have Alphitobius as a possibility, listed as introductions from Europe. The curved pronotum sides are intriguing. But I could also be way off.

this one is tricky, it seems.
I cannot confirm your last guess. Species of that genus are stouter and more convex, rather resembling Platydema then Tenebrio. Look yourself:
Alphitobius diaperinus
Alphitobius laevigatus

thanks Boris
Yes, I saw those images, but thought perhaps the dead ones with their legs and head tucked in might appear stouter. The punctation on the elytra intervals of Alphitobius is what really gave me concern, as I'm not sure I see that on Steve's photo.

I thought there had been a Tenebrionidae specialist visiting BugGuide, but I'm blanking on the name. I guess we'll keep looking.

Kojun Kanda
is our teneb specialist.

please move to family only!
To me, it looks different from T.molitor. What´s the size? I guess, because of the cloth it sits on, it will be less than 10 mm - what safely excludes the true mealworm beetles.

About 6 mm
I counted the stitches in the fabric weave (I'm using a bed sheet). 27 stiches per cm. It's under 10 mm.

No, it's a tenebrionid
something akin to a mealwo*rm beetle.

That looks very good. Only two species in Tenebrio in North America, though, and nothing else in the subfamily looks that close. do you think it's Tenebrio molitor?

The other species seems to have longer legs. I'd move it to Tenebrio molitor.

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