Diptera.info :: Family forums :: Syrphidae
Who is here? 1 guest(s)
 Chrysotoxum intermedium?
|
|
| dipdip |
Posted on 17-11-2007 14:55
|
 Member Location: Thunersee Switzerland Posts: 360 Joined: 17.12.05 |
Hello I think it is a female Chrysotoxum, but I don't know if it was Ch. intermedium. Could you help please? Maja dipdip attached the following image:  [92.33Kb] Edited by dipdip on 17-11-2007 14:56 |
|
|
|
| amalia_raluca |
Posted on 17-11-2007 18:38
|
 Member Location: Romania Posts: 590 Joined: 22.03.07 |
It looks more like C. cautum to me... Amalia |
|
|
|
| dipdip |
Posted on 17-11-2007 20:20
|
|
Member Location: Thunersee Switzerland Posts: 360 Joined: 17.12.05 |
In this case the triangle at the back would be "the membranous strip on tergite 6 which divides this tergite in two parts" as Gerard Pennards described it for cautum. I have only pictures .... Isn't cautum more hairy? Maja |
|
|
|
| Gerard Pennards |
Posted on 17-11-2007 23:24
|
 Member Location: Amersfoort Posts: 1914 Joined: 07.06.04 |
Well, in this case I agree with Maja, and I think this is a female of Chrysotoxun intermedium! The third antennal segment is clearly longer than segment 1 and 2 together, abdominal hairs (seemingly) very short and frons yellow! Also size and color of abdomen are different from cautum. This is how a typical female cautum looks like: http://www.microscopy-uk.org.uk/mag/imgmay07/chrysotoxum_cautum.jpg The membranous strip on segment 6 I'm talking about is visible on this specimen: http://www.evasion.it/ditteri/Chrysotoxum_cautum00.jpg Between the more orange colored parts of tergite 6 one can see the membranous strip as a yellow line in the middle! That's a feature only the female of cautum has!! Greetings, Edited by Gerard Pennards on 17-11-2007 23:27 Greetings, Gerard Pennards |
|
|
|
| dipdip |
Posted on 18-11-2007 10:26
|
|
Member Location: Thunersee Switzerland Posts: 360 Joined: 17.12.05 |
Thank you very much for helping! I'll try hard to veryfy what you explained next year. This year I didn't find many Chrysotoxum sp. Thanks and Regards Maja |
|
|
|
| Jump to Forum: |