Thread subject: Diptera.info :: Dasysyrphus?

Posted by Alvesgaspar on 25-11-2007 01:42
#1

First I thought this was a Dasysyrphus albostriatus but the wings seem too coloured. Body length 8-10mm.

Thanks,

Joaquim Gaspar

Posted by Sundew on 25-11-2007 02:22
#2

A Chrysotoxum, something like C. arcuatum? Compare this website: http://www.syrphi...20w07.html. There are lots of good syrphid photos.
Regards, Sundew

Posted by Alvesgaspar on 25-11-2007 13:38
#3

I don't think it is a C. arcuatum. Could it be a Xanthogramma pedissequum?

Joaquim Gaspar

Posted by Sundew on 25-11-2007 14:10
#4

No - Xanthogramma has different antennae. You can all those wasp-like species compare on the syrphid website above (http://www.syrphi...ege-chrys/).
Sundew

Posted by Kahis on 25-11-2007 14:35
#5

It is one of the Mediterranean Chrysotoxum species.

Posted by Alvesgaspar on 25-11-2007 19:12
#6

Thank you, Sundew and Kahis, after all I think you are right. It should be indeed C. arcuatum :)

Joaquim

Posted by amalia_raluca on 26-11-2007 18:47
#7

in my opinion this is C. fasciolatum
Amalia

Posted by Alvesgaspar on 26-11-2007 22:54
#8

Why do you think so, is there some clear evidence? The yellow stripes in C. fasciolatum seem narrower

Posted by amalia_raluca on 27-11-2007 15:40
#9

i will ckeck again because now at a secons view I am thinking that I am in a wrong direction...I have compared some pictures of C. fasciolatum with your picture...and you are write ..there are narrow stripes...and there are some other differences...B)
Amalia

Posted by amalia_raluca on 27-11-2007 18:39
#10

well...know I can tell you why I was thinking to fasciolatum....
wing: front margin yellowish with a distinct dark spot....abdomen elongate...now looking to the side you gave us...it could be arcuatum.
I also took in care the yellowish-orange hairs of the abdomen...
But let listen others opinions from others specialists, maybe I am completely wrong...
Amalia

Posted by Gerard Pennards on 28-11-2007 00:00
#11

This is a male Chrysotoxum intermedium (third antennal segment distinctly longer than 1 and 2 together, abdomen seemingly bare, frons black). But, as said before, it is generally believed this 'species' will turn out to be a species complex with more species in southern europe!
Greetings,

Posted by Alvesgaspar on 28-11-2007 02:00
#12

Thank you Gerard, looso it is the same as valter's :D