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Flower Fly - Ocyptamus fuscipennis

Flower Fly - Ocyptamus fuscipennis
Springfield, Virginia, USA
September 3, 2004
I thought this side view might be useful to add.

Images of this individual: tag all
Flower Fly - Ocyptamus fuscipennis Flower Fly - Ocyptamus fuscipennis

Ocyptamus fuscipennis (Say, 1823)
That is right it is Ocyptamus fuscipennis (Say, 1823), the anterior part of the wings is brown and the face is completely yellow and the tibia are completely brown. All the characters can be seen on the picture and make the identification easy.

I think these flies may belong to the genus Ocyptamus. Eric noted that he thought they once belonged to the genus Baccha (1),(2) (he says Bacca, but I assume that's a misspelling). According to the Syrphidae of Oklahoma (here) there were three Oklahoma species in that genus: fuscipennis, fascipennis, and clavata. According to Nomina Nearctica (here) and Ontario Syrphidae (available here) these species have been moved to Ocyptamus. These photos seem to fit the description for fuscipennis in the Syrphidae of Oklahoma - stated to be the most common and widespread species. However, I can't find any photos of this species online, and I'm not entirely sure what some of the characters in the Oklahoma key to tribe mean, or that they're visible in these photos - so I'm not sure if I'm looking in the right genus. However, if Eric is confident this species was once Baccha, then I suspect we can call this Ocyptamus fuscipennis.

Ocyptamus sp.
I think Joel is right.
There is also another species that was in the genus Baccha before, but now it has been moved to the genus Pseudodoros, and the species is P. clavatus. (there is a picture of it among the unidentified syrphid pictures on this site, the one with the blue background. I already put a comment on it!) The problem with identifications is that one almost always needs a specimen to study. In this case, in order to belong to Ocyptamus, it should have hairs on the so called anterior anepisternum, this is an area on the side of the thorax.
Unfortunately those hairs will never be visible on a picture!
The genus Ocyptamus is widespread in your part of the world, and there are 13 species known. The shape of the abdomen is very variable between the species. Some species have a small, narrow abdomen like the one on the picture, others have a broad oval abdomen.
Gerard Pennards

Thank you for the clarification!

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