Unknown Fly - Condylostylus melampus

Moved

Moved from unidentified black legged.

… John F. Carr, 27 June, 2014 - 7:51pm

Moved

Moved from ID Request.

… John F. Carr, 9 October, 2013 - 5:16pm

Condylostylus occidentalis

… Bill Dean, 9 October, 2013 - 11:19am

Or melampus?

Can you distinguish occidentalis from melampus?

… John F. Carr, 9 October, 2013 - 1:26pm

Looking at photographs of the

Looking at photographs of the Condylostylus melampus type specimen, the frons and pleurae look more frosted than C.occidentalis.
The blue on thorax, scutellum and base of abdomen of the type specimen of C. melampus is more extensive than C. occidentalis where the blue is restricted to the apex of the abdomen.
I think this is Condylostylus occidentalis.

… Bill Dean, 9 October, 2013 - 4:47pm

Front leg

According to the key by Robinson (1964),

Fore basitarsus with 4 bristles on apical half; 4 distal joints of fore tarsus about equal in length... pilicornis (Aldrich) (= occidentalis (Bigot))

Fore basitarsus with 7-10 bristles throughout length; 4 distal joints of fore tarsus of regularly decreasing length... melampus (Loew)

This fly seems to have more than 4 bristles but equal length segments 2-4.

Only melampus is recorded from New Mexico. Both species are recorded from Arizona. I don't know whether their ranges overlap.

… John F. Carr, 9 October, 2013 - 5:16pm

The features of the fore leg

The features of the fore leg are not easy to see. I think I`m going to settle for black-legged Condylostylus sp.
Condylostylus melampus is looking more and more likely, however.

… Bill Dean, 9 October, 2013 - 7:43pm

Fly

Looking at other pics and references your ID sure works for me. Thank you very much.

… Clifford Powell, 9 October, 2013 - 11:17am

How about Dolichopodidae (Long-Legged Fly).

… Arianna Weisbly, 9 October, 2013 - 11:04am