Diptera.info

Posted by Dmitry Gavryushin on 31-05-2006 21:42

One more lateral view (hope it's the same species.).

Edited by Dmitry Gavryushin on 31-05-2006 21:43

Posted by Paul Beuk on 01-06-2006 07:34

Well, you are lucky and you are not. They are not the same species, but there are tow different species (you may think that unlucky). I think you are lucky because there are two species, both are males and both can be identified. The top one is Neria commutata (= nigriocornis misident. sencu auct.), with the characteristic large triangular lobes on the abdominal venter. The bottom one is Calobata petronella, with narrow, posteriorly directed lobes on the abdominal venter.

Posted by Dmitry Gavryushin on 01-06-2006 08:43

Many thanks Paul,
I'd say I was lucky - two species is better than one

. And now I see differences between them. A propos, concerning the first fly, is a yellowish protrusion on its abdomen a specific structure or it was just damaged when collected?

Posted by Paul Beuk on 01-06-2006 08:45

That is the triangular lobe I mentioned. A seconday 'genitalic' structure.