Diptera.info :: Identification queries :: Diptera (adults)
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 parasite of bees
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| Cor Zonneveld |
Posted on 17-04-2007 19:52
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 Member Location: Amstelveen, the Netherlands Posts: 840 Joined: 14.10.06 |
I have seen this little fly several years on my 'bee hotel' (a slice of a tree with small holes drilled into it, creating nesting opportunities for various bees). I'm quite sure it parasitises on the food or larvae of the bee Osmia rufa, the main occupant of the rooms provided. The fly is slow, sitting on the wood or close to it, and occasionally enters the holes. If a bee notices this fly, they react furiously. According to my bee-book, this might be Cacoxenus indigator. Can any one confirm this? And what family belongs it to? On one picture you can see pollen on the wings of the fly, testimony of its trespassing into others property! Location: Amstelveen, The Netherlands, in my garden. Fly size: approx 4 mm. Date: April 17th. Thanks! Cor Cor Zonneveld attached the following image:  [129.79Kb] Edited by Cor Zonneveld on 17-04-2007 19:56 Thanks for your attention Cor Zonneveld |
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| Cor Zonneveld |
Posted on 17-04-2007 19:53
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Member Location: Amstelveen, the Netherlands Posts: 840 Joined: 14.10.06 |
here's a side view. The strange colors of the legs are surely spurious, effects of lighting condition.
Cor Zonneveld attached the following image:  [182.29Kb] Thanks for your attention Cor Zonneveld |
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| jorgemotalmeida |
Posted on 17-04-2007 20:19
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 Member Location: Viseu - PORTUGAL Posts: 9296 Joined: 05.06.06 |
Drosophilidae family. google.  |
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| Paul Beuk |
Posted on 17-04-2007 20:36
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 Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
Indeed, Cacoxenus indagator, well-known from Osmia nests.
Paul - - - - Paul Beuk on https://diptera.info |
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