Thread subject: Diptera.info :: Phaonia pallida? = Pegomya species
Posted by philporter on 21-10-2010 13:20
#1
Is this Phaonia pallida please.
Edited by philporter on 28-10-2010 09:58
Posted by Stephane Lebrun on 21-10-2010 17:05
#2
It looks more like
Thricops diaphanus : if the arista is only pubescent, strong proclinate orbital setae are present, strong presut. acr. are lacking or if there are setulae behind inner margin of hind coxa, it will be confirmed.
If only 3 post dc and at least 2 strong pd on hind tibia (and then anal vein reaching the wing border), it is
Pegomya (I can't see anything of these characters here).
Posted by Stephane Lebrun on 21-10-2010 17:20
#3
Having a second look on this one, I see small calypters and an ad on mid tibia, which speaks for Anthomyiidae (
Pegomya I think).
Posted by philporter on 21-10-2010 17:31
#4
I was just about to reply Stephane, that it is anthomyiidae simply because of the anal vein reaching the wing margin. I have no seen such a pale anthomyid before, so I was not expecting it to be so. Many thanks as always.
Posted by Stephane Lebrun on 21-10-2010 17:36
#5
Pegomya testacea or
geniculata could make some good candidates. Wait for Joke now...
Posted by philporter on 21-10-2010 18:34
#6
I've dipped not very thoroughly into Mr. Ackland's key and everything fits for Pegomya EXCEPT, unless I have interpreted it wrongly, that there is one of a pair of potentially crossed setae just below the ocellar triangle which are supposed to be missing in Pegomya. Is this dark red area the 'interfrontalia' that he refers to? The seta can be seen (at least at my end) on the left hand side of this area by its white scar mark. I have also included a dorsal view if it helps. I would say the hind tibia has 2 ad, 1 av and 2 which are either dorsal or pd. Middle tibia has 1 ad and 1 pd plus two small bristles side by side in the basal half, but leg bristles freak me.
Posted by philporter on 21-10-2010 18:35
#7
Dorsal
Posted by Stephen R on 21-10-2010 19:55
#8
Do you have a genera key for females? My version of Michael Ackland's key only does males - should I go back for more?
Posted by Stephane Lebrun on 21-10-2010 20:12
#9
Females do have crossed i.fr., not males if I remember well.
Posted by philporter on 21-10-2010 23:11
#10
Stephen, you have nothing new to go to I'm afraid; I have fallen into the trap of looking casually into the anthomyid key forgetting the lack of female characteristics within it. With Stephane mentioning that the females have bristles on the central frons area the difficulty goes away as far as genus is concerned.