Diptera.info :: Family forums :: Syrphidae
 Parhelophilus versicolor ?
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| bonitin |
Posted on 25-12-2009 12:33
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 Member Location: Gent, Belgium Posts: 348 Joined: 11.10.07 |
Hi, I found this pretty Syrphid on the 22nd of May this year in a local Nature Reserve with lots of Wetland in Gent, Belgium. Not sure if it is a male or female as these are tricky ones I thought? Thanks!     |
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| PIERRE MILLE |
Posted on 25-12-2009 19:15
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 Member Location: FRANCE (Conflans Ste Honorine -Yvelines) Posts: 72 Joined: 12.12.09 |
Hello, I think this looks like syrphid Helophilus pendulus and it is a female. PIERRE http://cyrille.du...orange.fr/ http://www.hoverf...portal.php |
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| bonitin |
Posted on 25-12-2009 20:44
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Member Location: Gent, Belgium Posts: 348 Joined: 11.10.07 |
Hi Pierre! Thanks but I don't think it is H.pendulus.. because of: H.pendulus has a black middle stripe on its face, then the bands though at first sight much alike, do differ too, the eyes of H.pendulus are much darker, also its antennae, these are orange-yellow in this fly. It also looks more hairy overall.. |
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| PIERRE MILLE |
Posted on 26-12-2009 17:43
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Member Location: FRANCE (Conflans Ste Honorine -Yvelines) Posts: 72 Joined: 12.12.09 |
Hi bonitin I'm sorry! with us we say "I give my tongue of the cat " which means I do not see that in this case. In your opinion what is the genus name? PIERRE http://cyrille.du...orange.fr/ http://www.hoverf...portal.php |
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| bonitin |
Posted on 26-12-2009 23:15
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Member Location: Gent, Belgium Posts: 348 Joined: 11.10.07 |
Hi, Pierre, I have given the name in the thread title above of what I think is my fly; Parhelophilus versicolor. I wanted a confirmation as there is another very much alike ;Parhelophilus fruticorum who's very hard to distingish from P.versicolor only by some subtle details one of them being the colours of the hairs on the back side of the head, behind the eyes. P.versicolor has them all yellow while P.fruticorum has a row of black hairs there, I cannot see in my fly. The Parhelophilus genus is one of the tricky exceptions among the usual rule that females have separate eyes whiles males have them closer together or joined. Males in this genus have them seperate too.. This is a Helophilus pendulus for you to compare   |
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| PIERRE MILLE |
Posted on 27-12-2009 16:08
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Member Location: FRANCE (Conflans Ste Honorine -Yvelines) Posts: 72 Joined: 12.12.09 |
Hi Bonitin, That's interesting ! I never knew there could be exceptions to distinguish females and males. I checked and it is not easy to distinguish. http://syrphidae.3644.co.uk/index.html I did some research and discovered that in the genus Parhelophilus and specifically P. frutetorum ago profile of the male's head with a yellow callus and femur 3 (posterior) of the male form as a kind of bump. I find it very informative !PIERRE http://cyrille.du...orange.fr/ http://www.hoverf...portal.php |
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| bonitin |
Posted on 27-12-2009 19:23
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Member Location: Gent, Belgium Posts: 348 Joined: 11.10.07 |
You are welcome Pierre! |
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| Andre |
Posted on 28-12-2009 13:12
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 Member Location: Tilburg, the Netherlands Posts: 2111 Joined: 18.07.04 |
I think this is P. frutetorum, but a possitive ID is too risky based on these pictures. |
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| bonitin |
Posted on 28-12-2009 16:40
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Member Location: Gent, Belgium Posts: 348 Joined: 11.10.07 |
Thank you Andre! So I can call it Parhelophilus frutetorum cf. I suppose.. |
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| PIERRE MILLE |
Posted on 28-12-2009 23:34
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Member Location: FRANCE (Conflans Ste Honorine -Yvelines) Posts: 72 Joined: 12.12.09 |
Thank you is very nice Bonitin
PIERRE http://cyrille.du...orange.fr/ http://www.hoverf...portal.php |
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