Diptera.info :: Identification queries :: Diptera (adults)
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 Opomyzidae
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| Roger Thomason |
Posted on 11-08-2009 17:38
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 Member Location: Mossbank,Shetland Isles. Posts: 5268 Joined: 17.07.08 |
This little one has been flapping around for most of the day in my garden. The only species that fits the bill in my Checklist is Geomyza balachowskyi, Same coordinates as my other postings Jan Willem Roger Thomason attached the following image:  [40.23Kb] |
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| Roger Thomason |
Posted on 11-08-2009 17:38
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Member Location: Mossbank,Shetland Isles. Posts: 5268 Joined: 17.07.08 |
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Roger Thomason attached the following image:  [43.8Kb] |
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| Roger Thomason |
Posted on 11-08-2009 17:39
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Member Location: Mossbank,Shetland Isles. Posts: 5268 Joined: 17.07.08 |
3. More if needed....
Roger Thomason attached the following image:  [48.2Kb] |
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| Jan Willem |
Posted on 11-08-2009 21:50
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 Member Location: Waalwijk, The Netherlands Posts: 2158 Joined: 24.07.04 |
Well this is a difficult one. In most cases (but not all) the females of G. balachowskyi have a more banded colour pattern on the adbomen. On the other hand, the postnotum (part of the thorax below the scutellum) is in most cases (but not all) much darker in G. hackmani. So the colouration of the abdomen would suggest G. hackmani, but the colouration of the postnotum would suggest G. balachowskyi. Studying sternite 8 (normally retracted and not readily visible) would give you the answer. So if you collected the specimen, you should study sternite 8.
Jan Willem van Zuijlen |
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