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unknown dipteran - Allograpta obliqua - male

unknown dipteran - Allograpta obliqua - Male
Pukaskwa National Park, Thunder Bay District, Ontario, Canada
June 28, 2010
Size: 10 mm
feeding on the flower of an endangered Pitcher's Thistle (Cirsium pitcheri).

Moved from ID Request.

Genus Allograpta
Someone else may be able to narrow it down further :-) It's definitely not micrura, and Bugguide has some obliqua images that seem to match. Maybe someone can rule out the other two Allograpta species.

ID: Allograpta obliqua
Note oblique marking at far end of abdomen. Oh, and it's a boy. (Eyes touch top front.)

Ron and others, thanks for sharing your expertise.

oblique markings
yeah, i just didn't know if the other species had those and just obliqua was the one that got named for it. But it looks like maybe range rules out exotica and radiata anyway...

Syrphid of some kind.
Someone else will probably be able to narrow it down for you.