Diptera.info :: Identification queries :: Diptera (adults)
 Unknown family (yellow halteres) ID > Dioctria?
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| Jeroen K |
Posted on 15-07-2010 16:12
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Member Location: Kapellen, Belgium Posts: 1141 Joined: 03.04.09 |
I found this two little flies (length: 12 mm) in my garden, Kapellen, Belgium. I think they are the same species, but I am not entirely sure. Never seen anything similar before. Yellow halteres, reddish-brown spot at both sides of the abdomen. More pictures and specimen available if needed. Thanks in advance. Specimen 1 - picture 1: Jeroen K attached the following image:  [161.61Kb] Edited by Jeroen K on 15-07-2010 17:48 |
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| Jeroen K |
Posted on 15-07-2010 16:13
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Member Location: Kapellen, Belgium Posts: 1141 Joined: 03.04.09 |
Specimen 1 - picture 2:
Jeroen K attached the following image:  [127.53Kb] |
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| Jeroen K |
Posted on 15-07-2010 16:13
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Member Location: Kapellen, Belgium Posts: 1141 Joined: 03.04.09 |
Specimen 2:
Jeroen K attached the following image:  [98.07Kb] Edited by Jeroen K on 15-07-2010 16:16 |
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| ChrisR |
Posted on 15-07-2010 16:44
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 Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Looks like Dioctria - Asilidae 
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| Sundew |
Posted on 15-07-2010 16:56
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 Member Location: Berlin and Baden-Württemberg, Germany Posts: 3939 Joined: 28.07.07 |
The reddish side spot is the result of the egg-swollen abdomen of this female. I go for Dioctria, too. |
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| Jeroen K |
Posted on 15-07-2010 16:59
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Member Location: Kapellen, Belgium Posts: 1141 Joined: 03.04.09 |
Thank you both! Any chance to identify the species? I will also try the key I found here, but I know very little about Diptera (I only became recently interested), so maybe I will overlook some details.
Edited by Jeroen K on 15-07-2010 17:00 |
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| ChrisR |
Posted on 15-07-2010 17:47
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Super Administrator Location: Reading, England Posts: 7706 Joined: 12.07.04 |
Off the top of my head I can't remember all the keying features but I think it boils down to leg colour/patterns (you could look through the Asilidae section in the Gallery). One of the asilid experts will be along soon though - just change the title to read 'Dioctria?' or something like that to draw them in
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| Sundew |
Posted on 15-07-2010 17:53
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Member Location: Berlin and Baden-Württemberg, Germany Posts: 3939 Joined: 28.07.07 |
Leg colouration is very variable at least in Dioctria hyalipennis, a frequent species. The key focuses on the lateral thorax and the tomentum pattern seen there. Unfortunately, your lateral shot does not show that, it is too dark. |
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| Jeroen K |
Posted on 15-07-2010 18:46
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Member Location: Kapellen, Belgium Posts: 1141 Joined: 03.04.09 |
Thanks for the hint, Chris, I changed the title. I already took a look at the Gallery, but I could only eliminate D. oelandica, which leaves 8 species* (linearis, cothurnata, hyalipennis, atricapilla, bicincta, lateralis, longicornis, rufipes). Sundew, I tried to make a close up of the lateral thorax through a looking glass, but I'm a really bad photographer. Here's my try... *according to the list on Waarnemingen.be (Belgian website for nature observations) Jeroen K attached the following image:  [81.7Kb] Edited by Jeroen K on 15-07-2010 18:47 |
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