Thread subject: Diptera.info :: Xylota?

Posted by Marion Friedrich on 14-07-2012 19:51
#1
It looks like Xylota florum in the gallery, but there are similar looking species. Can somebody confirm or correct?

Thanks, Marion

Photo: Germany, Saxony, 15.06.2012

Posted by tristram on 17-07-2012 23:04
#2
Stubbs and Falk (in British Hoverflies) say:

"... X. florum can be readily distinguished from the coeruleiventris/jakutorum pair ... In the female the spots on tergites 2 and 3 are orange, and the grey dust spots on the frons are pointed towards the middle and do not meet."

"Another narrow-bodied European species, meigeniana Stackelberg 1964, could easily be confused with florum. ... In the female [meigeniana], the hind femur has only short erect white semi-dorsal hairs which are confined to a small area near the base (in florum there are additional longer erect hairs extending along the basal quarter or more). ..."
Edited by tristram on 17-07-2012 23:05

Posted by Marion Friedrich on 21-07-2012 20:19
#3
Thank you for the key, tristram.
It is a pity that I do not have additional pictures. The spots on the frons do not meet, but I can´t see enough to evaluate the hairs on the hind femur.
Marion