Thread subject: Diptera.info :: Helophilus problem

Posted by Tony Irwin on 19-07-2008 09:09
#1
Caught on a saltmarsh in Norfolk, England 16 July 2008.
Female Helophilus species with female H.trivittatus (on left) for comparison.
Any suggestions?
Edited by Tony Irwin on 19-07-2008 09:09

Posted by Tony Irwin on 19-07-2008 09:10
#2
another dorsal view

Posted by Tony Irwin on 19-07-2008 09:11
#3
and lateral

Posted by Tony Irwin on 19-07-2008 09:12
#4
and face (trivittatus on left)

Posted by Stephane Lebrun on 19-07-2008 10:13
#5
Hello Tony, your specimen has hind margin of tergites black, so I can suggest you a female of Hellophilus affinis. Fore tarsi should be darkened only on dorsal surface. Other characters seems to correct for me.

Posted by Tony Irwin on 19-07-2008 10:31
#6
Thanks Stephane - I did wonder about affinis, but the fore tarsi are darkened below. Sad

Posted by Stephane Lebrun on 19-07-2008 11:06
#7
I don't know how reliable is that character, but I can't see anything else matching with this one. The close H. groenlandicus is very improbable by having a black area of hair on scutum, well darker legs, sharper spots on T2...

Posted by Andre on 19-07-2008 16:50
#8
Why not a very dark hybridus? They do occur...