Thread subject: Diptera.info :: Syrphus ribesii ?? => probably S. torvus (f)

Posted by Marc T on 16-07-2013 21:32
#1
Hi together,

is this a male from S. ribesii? Thanks for correction/confirmation!

Best regards,

Marc

Found yesterday, July, 15th 2013 close to Wedel, S-H, Northern Germany (Tävsmoor)
Edited by Marc T on 25-07-2013 05:35

Posted by Sundew on 16-07-2013 21:58
#2
Where is the photo?

Posted by Marc T on 17-07-2013 06:15
#3
And now with foto - thanks Sundew awkward
Edited by Marc T on 17-07-2013 06:16

Posted by Sundew on 25-07-2013 00:03
#4
Well, Syrphus is not my beloved genus... According to the wide frons, this seems to be a female, though the abdomen tip looks a bit masculine! Female is better, males are hardly separable. The femora are much too black for S. ribesii. So we have to consider S. vitripennis and S. torvus. At high magnification I think I see hairs on the eye. In this case it is S. torvus Smile. (Compare http://farm3.stat...5520_o.jpg.)
Edited by Sundew on 25-07-2013 00:06

Posted by Marc T on 25-07-2013 05:33
#5
Thanks a lot, Sundew,

I've just tried to zoom in in the original RAW-pic, but there's not much more to see than on the jpg (it was pretty windy that day and the damned fly didn't want to sit on one place ...) In fact, the lower half of the eye seems to be covered with hairs, but I can recognize hairs just on the frontal edge of the eye, not on the surface than on your linked pic. This might well be just an artifact from photography!?

Best regards,

Marc

Posted by Sundew on 25-07-2013 19:19
#6
Since the eyes are convex and macro pics have a shallow depth of field, one can see only parts of the hairy area. However, if there are some hairs visible there are certainly more of them present, as they are evenly distributed Smile!