Thread subject: Diptera.info :: Which Chrysotoxum?

Posted by Steve Makin on 11-09-2008 10:28
#1
On the 1st of July by the edge of a field near Great Brickhill, buckinghamshire, England.

I was thinking Chrysotoxum cautum or maybe verralli.

Posted by Steve Makin on 11-09-2008 10:32
#2
Maybe this time the photo will appear....

Posted by Steve Makin on 11-09-2008 10:34
#3
And another....

Posted by Andre on 11-09-2008 15:40
#4
cautum it is Smile

Posted by Gerard Pennards on 11-09-2008 19:01
#5
Nope, not cautum, on the second picture it's clearly visible that antennal segment 3 is shorter than segments 1 and 2 together.
So it's Chrysotoxum verralli indeed, which also fits better it's general shape and color!
greetings

Posted by Steve Makin on 11-09-2008 19:13
#6
Does this help?

Posted by Gerard Pennards on 14-09-2008 16:39
#7
Hello Steve,
Yes, i't proves my point.
I took the liberty to work your picture a bit, you see antennal segments 1, 2 and 3.
In cautum 3 should be as long as 1 and 2 together, which clearly isn't the case. 3 is much shorter than 1 and 2 combined.
So it's a female Chrysotoxum verralli!
Greetings
Edited by Gerard Pennards on 14-09-2008 16:40

Posted by Steve Makin on 16-09-2008 14:03
#8
Veralli it is, then.

Thanks very much to both of you for your help.