Posted by David Gibbs on 01-10-2007 11:06
#8
so we end up with Gymnochiromyia. There are only two species that have brown ocellar triangle, and only one of these have yellow abdomenal tergites. - G. inermis.
i have to disagree, your reasoning does not accord with my own experience. The head (frons) shape is indeed different in the two genera, Gymnochiromyia narrower, converging forward, especially in male inermis, much less clear in female flavella. your photo is of a female and has a very wide frons. it is not safe to rely on this character, you need to see the setae on dorsum of scutellum and occiput.
i suspect your photo is a female Chyromya, probably of the flava/femorella complex (still taxonomically unresolved). there are also undescribed species in Europe.
even with a very good photo it would be unwize to name such a fly to species.