Diptera.info :: Identification queries :: Diptera (adults)
 resin-flies
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| Robert Heemskerk |
Posted on 02-07-2006 23:02
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 Member Location: Amsterdam, Netherlands Posts: 2082 Joined: 17.10.05 |
hi flyforum, On some conifer there were little flies active on the resin of the bark. I try to understand the flies but it was not my language.. they were waving with there wings, it looks like a ritual.. than, suddenly they got contact with there legs.., touching each other  any idea what kind of flies these are? and what agreement is this? are they selling resin? greeting, Robert Robert Heemskerk attached the following image:  [99.01Kb] Edited by Robert Heemskerk on 02-07-2006 23:09 |
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| Robert Heemskerk |
Posted on 02-07-2006 23:03
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Member Location: Amsterdam, Netherlands Posts: 2082 Joined: 17.10.05 |
shaking hands.. or fight? on this size, I can not see the difference.. Robert Heemskerk attached the following image:  [85.49Kb] Edited by Robert Heemskerk on 02-07-2006 23:05 |
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| Robert Heemskerk |
Posted on 02-07-2006 23:06
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Member Location: Amsterdam, Netherlands Posts: 2082 Joined: 17.10.05 |
close up of one of these flies..
Robert Heemskerk attached the following image:  [92.95Kb] Edited by Robert Heemskerk on 02-07-2006 23:07 |
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| Tony Irwin |
Posted on 02-07-2006 23:56
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 Member Location: Norwich, England Posts: 7327 Joined: 19.11.04 |
These are Phalacrotophora (Phoridae). I also have some photos of these flies displaying on tree-trunks. I'll post the photos when I've identified the species. Tony Tony ---------- Tony Irwin |
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| Paul Beuk |
Posted on 03-07-2006 07:45
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 Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
They are indeed Phalacrotophora and they have nothing with resin except that they use bumps on trees for mating display. The females oviposit on fresh pupae of Coccinellidae and the larvae feed on the pupa. More than one specimen can emerge from a pupa and I have once even reared two different species from a single pupa. Also see downloads HERE.
Paul - - - - Paul Beuk on https://diptera.info |
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| Mario Langourov |
Posted on 03-07-2006 08:53
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Member Location: Sofia, Bulgaria Posts: 23 Joined: 01.03.06 |
That's right! These are two females of Phalacrotophora sp.; I have some indications that one of the European species (Ph. pictofasciata) develops on Cerambycidae-larvae
Edited by Mario Langourov on 03-07-2006 16:30 |
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