Thread subject: Diptera.info :: Syrphus vitripennis ? No, S. cf. torvus

Posted by kuv on 14-03-2015 10:57
#1

Northern Germany, Schleswig-Holstein, Schenefeld near Hamburg, at an uncultivated natural area near a small rivulet, 25 m, Outsidefoto (only this pic): kuv, 22th of June 2013. Is my idea correct? Please help to get the ID.
Kuv

Edited by kuv on 16-03-2015 10:28

Posted by daveb21 on 14-03-2015 20:25
#2

If those are hairs on the eyes could S. torvus if you get them where you are?

Posted by kuv on 15-03-2015 16:52
#3

Thank you very much Dave - :).
To check whether I have understood you in the right way I first put an enlarged pic of the hairy eyes to the thread. And second I can tell that S. torvus is reported in whole Germany (where I found the fly).
Best regards Kuv

Posted by daveb21 on 15-03-2015 18:38
#4

Hi Kuv,
Fine white hairs on the eyes themselves are used to differentiate S. vitripennis and S. torvus in the U.K. S .torvus flies early so if no other Syrphus with hairy eyes in your area then should be fine for torvus. (Sorry don't really know continental Hovers as yet.

Dave

Posted by kuv on 15-03-2015 19:09
#5

Thank you Dave. Unfortunately both, S. torvus and vitripennis fly here evidently from March to September/October in several generations. As I don't know whether the eyes at the second pic are "hairy" enough I 'll change the headline of this thread hoping somebody knows exactly ...
Best regards Kuv

Posted by daveb21 on 15-03-2015 20:48
#6

Eyes are hairy enough, not so dense in females, eye hairs not in vitripennis; meant that I was unsure if other Syrphus in your area may be similar :)

Posted by kuv on 16-03-2015 10:26
#7

Thank you Dave once more. As I found a key where the difference is called "numerous hairs -> S. torvus" to "some very short scattered hairs to other like S. nitidifrons" I think it is best to say for my fly "S. cf. torvus".
Best regards Kuv