Diptera.info :: Identification queries :: Diptera (adults)
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 Another Gonia.
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| Nikita Vikhrev |
Posted on 29-04-2006 15:39
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 Member Location: Moscow, Russia Posts: 9220 Joined: 24.05.05 |
Moscow, park, near jusing birch, 10-11mm, 29 apr. There is some orange on the head, but generaly head is much more yellow. So, it isn't one more melanist of G. divisa. Abdomen black with one small red spot and well developed white lines. Gonia ornata? Nikita Vikhrev attached the following image:  [84.47Kb] Nikita Vikhrev - Zool Museum of Moscow University |
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| Zeegers |
Posted on 29-04-2006 16:19
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Member Location: Soest, NL Posts: 18528 Joined: 21.07.04 |
Hi Nikita Gonia are very difficult and then again, I may be fooled by the reflexion of the light and/or the flash. So, I really need to see the specimen itself to be sure. First impression is G. picea, but the tail is out of focus, which makes it even harder to come to a definite conclusion. Sorry Theo |
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| Nikita Vikhrev |
Posted on 29-04-2006 16:32
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Member Location: Moscow, Russia Posts: 9220 Joined: 24.05.05 |
Thank you Theo. Could I try to show you two more vue of this fly? Nikita Nikita Vikhrev attached the following image:  [71.73Kb] Nikita Vikhrev - Zool Museum of Moscow University |
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| Nikita Vikhrev |
Posted on 29-04-2006 20:09
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Member Location: Moscow, Russia Posts: 9220 Joined: 24.05.05 |
Same fly. Lateral vue with red spot and cheek. Please, Theo, help! Nikita Vikhrev attached the following image:  [68.43Kb] Nikita Vikhrev - Zool Museum of Moscow University |
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| ChrisR |
Posted on 30-04-2006 10:38
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 Administrator Location: Reading, England Posts: 7699 Joined: 12.07.04 |
Hmm ... possibly Gonia picea, as Theo suggested - the red marks are very reduced. But that's just how I would identify it here in England - I am not sure what other strange and wonderful species you have in Moscow  I went out yesterday to look for interesting tachinids but all I saw were Gymnocheata viridis - 100s of them all sitting on tree trunks and fence posts. They're a nice easy species to identify but it would have been good to see something a bit more exciting, like a Gonia or T.ursina.  Chris R. Edited by ChrisR on 30-04-2006 10:41 |
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| Nikita Vikhrev |
Posted on 30-04-2006 15:07
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Member Location: Moscow, Russia Posts: 9220 Joined: 24.05.05 |
1. Thank you Chris. 2. Never seen G. viridis alife. 3. Today I collected several small brown-black Tachinidas from the wall of my countryhouse. And two more Gonia divisa. Same place as 5 days before, all same melanist Nikita Nikita Vikhrev - Zool Museum of Moscow University |
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| Zeegers |
Posted on 30-04-2006 17:28
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Member Location: Soest, NL Posts: 18528 Joined: 21.07.04 |
Hi Nikita, this helps. You can see * white pruinescense on the parafacialia in some pictures * small white band on last tergite * bristles on parafacialia are less dense than in divisa So this equals G. picea, as guessed earlier. Theo |
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| Nikita Vikhrev |
Posted on 30-04-2006 18:59
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Member Location: Moscow, Russia Posts: 9220 Joined: 24.05.05 |
Theo, thank you very very much! P.S. Do you need G. divisa black morpha for your collection? Nikita Vikhrev - Zool Museum of Moscow University |
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