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 Two more Phasia?
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| Dmitry Gavryushin |
Posted on 04-07-2006 10:02
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 Member Location: Posts: 3303 Joined: 17.10.05 |
The first fly. July 01, 2006. Size 4.5-5mm. |
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| Dmitry Gavryushin |
Posted on 04-07-2006 10:03
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Member Location: Posts: 3303 Joined: 17.10.05 |
Another view. |
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| Dmitry Gavryushin |
Posted on 04-07-2006 10:04
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Member Location: Posts: 3303 Joined: 17.10.05 |
The head. |
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| Dmitry Gavryushin |
Posted on 04-07-2006 10:06
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Member Location: Posts: 3303 Joined: 17.10.05 |
The second fly. July 01, 2006, on Carex. Size 6-7mm. |
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| Dmitry Gavryushin |
Posted on 04-07-2006 10:07
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Member Location: Posts: 3303 Joined: 17.10.05 |
Another view. |
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| ChrisR |
Posted on 04-07-2006 12:43
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 Administrator Location: Posts: 7699 Joined: 12.07.04 |
Lovely photos, again!  1. looks like Phasia obesa (female) - if it has yellow hairs on the gena. 2. isn't a Phasia sp. - I think it is more like Cistogaster, Clytiomya or Eliozeta. I can't quite see if the wing is petiolate or not - can we see a photo with a clearer wing-tip?  (sorry, no matter how good the photo I always seem to ask for more!  )
Edited by ChrisR on 04-07-2006 12:53 |
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| Nikita Vikhrev |
Posted on 04-07-2006 12:47
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 Member Location: Posts: 9193 Joined: 24.05.05 |
Chris, I have to disagree about first one. My test it is male, Phasia barbifrons. Nikita Nikita Vikhrev - Zool Museum of Moscow University |
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| ChrisR |
Posted on 04-07-2006 12:55
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Administrator Location: Posts: 7699 Joined: 12.07.04 |
Hi Nikita, Fly-1 does have yellow haltares but it also has a lot of grey dusting on the thorax, which is more characteristic of Phasia obesa. The colour of the hairs on the gena is apparently a very good way to split obesa from barbifrons in difficult specimens |
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| Nikita Vikhrev |
Posted on 04-07-2006 13:05
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Member Location: Posts: 9193 Joined: 24.05.05 |
Hi Chris. I compared Black's fly my photos of Ph. obesa and Ph. barbifrons and collected Ph. barbifrons I have. My Ph. obesa has much more dusting thorax, but Ph. barbifrons has not dust at all. So, it seems you are right, I'm wrong. Nikita Vikhrev - Zool Museum of Moscow University |
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| ChrisR |
Posted on 04-07-2006 13:33
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Administrator Location: Posts: 7699 Joined: 12.07.04 |
In the key it says that in Phasia barbifrons is *should* have a completely dark thorax ... but just as obesa *should* have a heavily dusted thorax there are occasions where the features are not as they should be So, last week Peter Tschorsnig said this hair colour on the gena is a nice way to split off obesa from the other 2 small ones easily ... so more work for Dima |
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| Dmitry Gavryushin |
Posted on 04-07-2006 20:17
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Member Location: Posts: 3303 Joined: 17.10.05 |
Thanks Chris and Nikita (I hope you don't mind me barging in your educated dialogue ) - I'll check the wing-tip later. |
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| Dmitry Gavryushin |
Posted on 14-07-2006 11:20
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Member Location: Posts: 3303 Joined: 17.10.05 |
Hello Chris, I hope this picture would help you with the colour of hairs on genae. |
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| Dmitry Gavryushin |
Posted on 14-07-2006 11:31
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Member Location: Posts: 3303 Joined: 17.10.05 |
Chris, I hope this picture would tell you more about the second fly. |
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| ChrisR |
Posted on 15-07-2006 20:16
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Administrator Location: Posts: 7699 Joined: 12.07.04 |
Hi Dima - sorry for the delay but I missed these updates for a day or two. The Phasia is now definitely P.obesa - lovely photo of the gena I'll get back to you on the orange one |
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| Dmitry Gavryushin |
Posted on 15-07-2006 20:21
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Member Location: Posts: 3303 Joined: 17.10.05 |
Thanks Chris - actually I had some network problems and no Internet access in last 24hrs. |
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| ChrisR |
Posted on 16-07-2006 11:53
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Administrator Location: Posts: 7699 Joined: 12.07.04 |
I have keyed the little orange fly as best I can (using the Palearctic genera software key + the Central European key) and it comes out to Eliozeta helluo but I don't have any examples to check it against. Perhaps you or Nikita can check Russian references to see if you can find specimens to check against. Fauna Europaea has a nice map that shows it should reach your part of the world: http://www.faunae...on1=144281  |
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| Dmitry Gavryushin |
Posted on 16-07-2006 12:19
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Member Location: Posts: 3303 Joined: 17.10.05 |
Hello Chris, what a impressive name! Hope Nikita could check it somehow. Thanks a lot . One more Tachinidae from my balcony in a few minutes. |
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| Dmitry Gavryushin |
Posted on 23-07-2006 21:43
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Member Location: Posts: 3303 Joined: 17.10.05 |
Hello Chris, could this be the same one? July 23, 2006, our town park, swept from grasses near water, size 7mm. |
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| ChrisR |
Posted on 23-07-2006 23:03
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Administrator Location: Posts: 7699 Joined: 12.07.04 |
It certainly looks like one - but older and tatty with rubbed-off bristles on the abdomen - you can still see the bristle sockets there the marginals used to be |
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| Dmitry Gavryushin |
Posted on 23-07-2006 23:25
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Member Location: Posts: 3303 Joined: 17.10.05 |
Yes I see these clearly - thanks Chris |
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