ground beetle - Bembidion patruele

Moved

… Peter W. Messer, 12 September, 2010 - 10:10am

Bembidion patruele

Thanks David and Peter. Now I'll have to get out and find a real B. grapii:-)
This photo should be the original one I posted, without any modifications.

… tom murray, 12 September, 2010 - 10:18am

not Peryphanes

This is not a member of the subgenus Peryphanes. Those all uniformly dark elytra. It's a bit hard to be sure what it is from the picture, but my best guess given the size would be Bembidion patruele

… David Maddison, 11 September, 2010 - 11:43pm

Agree, in subgenus Notaphus (dorsale species group)

in which image is indeed consistent with member B. patruele. Thank you once again David for setting the record straight (also David, see my request at bottom). Subsequent to this image submission in 2007, Tom Murray began sending me several photo-linked voucher specimens from his MA area that easily keyed to common and widespread B. patruele. I'm not sure what I was smoking when I made the original ridiculous comment "uniformly dark non-metallic body". Clearly the elytra show a pale spotted-banded pattern. Tom, by chance do you remember if you had re-submitted a photographically lighter image of the same which I know BugGuiders sometimes do? At any rate, subgenus Notaphus is further supported while subgenus Peryphanes (= grapii group) is refuted based on striations visibly complete to elytral apices and just barely visible dorsal punctures located inside third intervals. While technically not confirmed to species level, for all practical purposes here at BugGuide I decided to move this image to "B. patruele".

David: I would appreciate your input on provisional Bembidion egens. Thanks!

… Peter W. Messer, 12 September, 2010 - 10:04am

Thanks Peter

It was probably 5mm, larger than many of the other Bembidions I've seen. Hopefully the rest of your message makes it through.

… tom murray, 3 October, 2007 - 3:22pm

Bembidion : subgenus Peryphanes : B. grapii?

Here is my original reply that was cut off: "A member of the so-called "grapii species group" in subg. Peryphanes is about the best I can do given the limited photgraphic detail; supported by uniformly dark non-metallic body and rather cordate pronotum. If species group is true, choices narrow to only three such species in MA. Of these, the body size (always 5 mm)". --- Tom, If you can convince yourself that body size was no more than 5 mm, then B. grapii is most likely.

… Peter W. Messer, 3 October, 2007 - 6:21pm

cut off again and so I'm trying last time!!!

Of these, the body size (always 5 mm)". --- Tom, If you can convince yourself that body size was no more than 5 mm, then B. grapii is most likely.

… Peter W. Messer, 3 October, 2007 - 6:24pm

another try

Needed for B. grapii: body size always less than 5 mm; dark palpi & basal antennomeres. If not these traits, consider B. lacunarium (>5 mm).

… Peter W. Messer, 3 October, 2007 - 6:28pm

B. grapii

I'm confident that this one was no larger than 5mm. It was larger than the 3mm ones that I come across most of the time, but still not too big.

… tom murray, 3 October, 2007 - 7:37pm

my reply cut off.

I tried twice and each time the last part of my reply is cut off after hitting "post comment". But when I go into edit mode it is all still there! Why? You still need to see my entire reply after I try a third time some time soon.

… Peter W. Messer, 3 October, 2007 - 3:11pm

Bembidion : subgenus Perphanes : B. grapii?

A member of the so-called "grapii species group" in subg. Peryphanes is about the best I can do given the limited photgraphic detail; supported by uniformly dark non-metallic body and rather cordate pronotum. If species group is true, choices narrow to only three such species in MA. Of these, the body size (5 mm).

… Peter W. Messer, 3 October, 2007 - 3:01pm

Bembidion : subgenus Peryphanes : B. grapii?

… Peter W. Messer, 3 October, 2007 - 2:49pm