Thread subject: Diptera.info :: Helophilus pendulus, Syrphidae, Hungary, April 2007
Posted by Xespok on 17-04-2007 20:24
#1
Simiar to Helophilus sp, but is this a different genus?
Edited by Xespok on 17-04-2007 21:02
Posted by Xespok on 17-04-2007 20:25
#2
Another view.
Posted by Paul Beuk on 17-04-2007 20:26
#3
Why not simply
pendulus?
Posted by Xespok on 17-04-2007 21:01
#4
Well, mostly because I had never seen a female pendulus here. Trivittatus is so much more dominant.
Posted by Kahis on 17-04-2007 21:16
#5
Really? Up here in Finland pendulus is very, very common and it also looks like a migrant, so I would except to find females anywhere, anytime.
Posted by Stephane Lebrun on 17-04-2007 21:26
#6
Hello,
the black facial stripe rule out H. trivittatus. The almost completely black hind legs rule out H. pendulus.
My guess is Helophilus affinis female because the hind margin of T3 and T4 are only weakly yellowed, without distinct yellow band. The fore tarsi and apical part of fore tibia are strongly darkened, but seem yellow below.
If I am mistaken, it is with H. hybridus wich as broader patterns on tergites and fore tarsi/apical part of tibia completely dark, even below.
Regards.
Posted by Dieter on 18-04-2007 00:38
#7
I think Stephane is right. And the hind tibia is much more red in pendulus. H. hybridus is very improbable due to the comparatively small size of the yellow spots on 2nd tergite.
Regards,
Dieter
Posted by Xespok on 18-04-2007 19:48
#8
This would be a new record for Hungary. Only trivittatus, pendulus and hybrydus are present on the Hungarian checklist. I hope I have this specimen. I have specimens for around 60% of the flies that I photogralphed this year. The others flew off.
Trivittatus is more common in Hungary, and I tend to see pendulus only in early spring. Actually I have a photo of a female, so my previous statement about never having seen a female was wrong. I also do not know how reliable the difference is, but I feel that trivittatus tends to be yellowish, while pendulus is more orangish.
Edited by Xespok on 18-04-2007 19:52
Posted by Stephane Lebrun on 18-04-2007 22:29
#9
Xespok wrote:
I also do not know how reliable the difference is, but I feel that trivittatus tends to be yellowish, while pendulus is more orangish.
Among Helophilus species, H. trivittatus is unmistakable by its large size (14-17 mm) and by the yellow stripe on the face, that other Helophilus never have.
The lighter colours of H. trivittatus are also a clue indeed.
Regards.