Diptera.info :: Identification queries :: Diptera (adults)
 A small fly at my balcony (2)
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| Dmitry Gavryushin |
Posted on 23-05-2006 20:27
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 Member Location: Moscow region, Russia Posts: 3346 Joined: 17.10.05 |
May 23, 2006. Size 3mm. Dmitry Gavryushin attached the following image:  [106.01Kb] |
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| Dmitry Gavryushin |
Posted on 23-05-2006 20:28
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Member Location: Moscow region, Russia Posts: 3346 Joined: 17.10.05 |
Here's a dorsal view.
Dmitry Gavryushin attached the following image:  [100.75Kb] |
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| Kahis |
Posted on 23-05-2006 20:52
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 Member Location: Helsinki, Finland Posts: 1999 Joined: 02.09.04 |
It's a tachinid, probably tribus Siphonini but not Siphona as it does not have a long proboscis. Pwrhaps Actia?
Kahis |
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| Dmitry Gavryushin |
Posted on 23-05-2006 21:48
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Member Location: Moscow region, Russia Posts: 3346 Joined: 17.10.05 |
Thanks a lot Kahis, I never met (in my Diptera-conscious time) such a small Tachinidae. |
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| ChrisR |
Posted on 23-05-2006 22:35
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 Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Definitely a tachinid. I'd kind of agree with Kahis about Actia but it might also possibly be something like Phytomyptera sp. or Paracraspedothrix montivaga. I will compare them to some specimens here and come back to you  |
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| ChrisR |
Posted on 24-05-2006 09:58
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
After checking my specimens I think it is an Actia - perhaps infantula, but I can't see the katepisternum clearly enough to be sure. Replying to Black's comments on its small size: There are several small species of tachinid in families like Actia , Phytomyptera and Paracraspedothrix. These have correspondingly small hosts, like micro-moth larvae in fungi. Of course, if the host is extra small and doesn't eat well then the resulting tachinid fly is even smaller than normal 
Edited by ChrisR on 24-05-2006 10:12 |
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| Dmitry Gavryushin |
Posted on 24-05-2006 12:44
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Member Location: Moscow region, Russia Posts: 3346 Joined: 17.10.05 |
Thanks a lot Chris, I've just checked what on Earth that katepisternum is (with Syrphidae as an example, http://home.hccnet.nl/mp.van.veen/KEYS/bodypart.htm) and there's more lateral views available, so maybe I'll post an additional image when I'm (finally) home. Regarding small size, now I remember recent discussion here about Tachinidae spp. size variations, yet I presume that flies of the mentioned genae are typically/invariably small... |
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| ChrisR |
Posted on 24-05-2006 17:45
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Yes, if you have any additional images please send them - they are very good Also, if you can see a way of enlarging the katepisternum so that we can see the bristles clearly then that would help. Thanks |
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| Zeegers |
Posted on 24-05-2006 21:01
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Member Location: Soest, NL Posts: 19293 Joined: 21.07.04 |
I think it is Peribaea tibialis: Male Actia infantula has larger third antennal segment. It seems to be a male (?). Moreover, the lowest sternopleural bristles seems to be thick. Other species of Actia can be ruled out by the lack of bristles on the CU-vein. As can very well be seen in the picture. Theo Zeegers |
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| ChrisR |
Posted on 24-05-2006 21:53
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Ahhh, good work Theo - we don't have Peribaea tibialis here so I am not familiar with it. |
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| Zeegers |
Posted on 25-05-2006 09:30
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Member Location: Soest, NL Posts: 19293 Joined: 21.07.04 |
Thanks still, a additional photo showing either the sternopleuron or the wing would be useful. I consider the ID provisionally. Theo |
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| Dmitry Gavryushin |
Posted on 25-05-2006 10:55
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Member Location: Moscow region, Russia Posts: 3346 Joined: 17.10.05 |
Thanks again Theo and Chris, Here's the best combined crop of lateral views I was able to make. Dmitry Gavryushin attached the following image:  [107.71Kb] |
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| Dmitry Gavryushin |
Posted on 25-05-2006 10:57
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Member Location: Moscow region, Russia Posts: 3346 Joined: 17.10.05 |
And the wing.
Dmitry Gavryushin attached the following image:  [100.72Kb] |
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