Diptera.info :: Identification queries :: Diptera (adults)
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 What kind of tachinid fly is this?
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| wilde |
Posted on 07-07-2008 17:07
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Member Location: Koudekerke, Netherlands Posts: 169 Joined: 13.09.06 |
Wings look a bit like Muscidae. Little fly, about 5 mm, Koudekerke, Netherlands. Recently I tried to breed the wasps of a parasitized larva of Pieris brassicae. The results were about 20 tiny wasps (3 mm) and 1 specimen of this fly. Lateral view: wilde attached the following image:  [103.01Kb] Edited by wilde on 16-07-2008 19:56 Albert de Wilde |
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| wilde |
Posted on 07-07-2008 17:09
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Member Location: Koudekerke, Netherlands Posts: 169 Joined: 13.09.06 |
... and a dorsal view:
wilde attached the following image:  [125.96Kb] Albert de Wilde |
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| jorgemotalmeida |
Posted on 07-07-2008 17:14
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 Member Location: Viseu - PORTUGAL Posts: 8816 Joined: 05.06.06 |
Tachinidae.  |
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| wilde |
Posted on 07-07-2008 17:45
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Member Location: Koudekerke, Netherlands Posts: 169 Joined: 13.09.06 |
Before posting I already searched in the book of Theo about Tachinidae, but didn't succeed. What kind of details are needed to get the species name?
Albert de Wilde |
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| ChrisR |
Posted on 07-07-2008 17:48
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 Super Administrator Location: Reading, England Posts: 6978 Joined: 12.07.04 |
Hard to say what it is (maybe Phryxe, maybe Meigenia) - got any more angles? I would like to see if the apical scutellars are crossed. |
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| wilde |
Posted on 07-07-2008 22:41
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Member Location: Koudekerke, Netherlands Posts: 169 Joined: 13.09.06 |
I would like to see if the apical scutellars are crossed. Sorry Chris, but what do you mean by scutellars? Are they hairs or bristles on the scutellum? I couldn't find the definition of this substantive.
Albert de Wilde |
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| Sundew |
Posted on 07-07-2008 23:31
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 Member Location: Berlin, Germany Posts: 2176 Joined: 28.07.07 |
Right, bristles. Do you know the nice Anatomical Atlas of Flies (http://www.ento.c...ssary.html)? It is very helpful! Regards, Sundew |
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| ChrisR |
Posted on 08-07-2008 00:11
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Super Administrator Location: Reading, England Posts: 6978 Joined: 12.07.04 |
In this fly the apical scutellar bristles are raised almost vertically, which is unusual. I was just interested to see if the are crossed or not |
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| wilde |
Posted on 08-07-2008 11:30
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Member Location: Koudekerke, Netherlands Posts: 169 Joined: 13.09.06 |
Seaching for hosts I found Phryxe vulgaris as an endoparasitoid of the Pieris brassicae caterpiller. I think this is what you wanted to see (crossed): wilde attached the following image:  [133.55Kb] Edited by wilde on 08-07-2008 12:21 Albert de Wilde |
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| ChrisR |
Posted on 08-07-2008 16:43
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Super Administrator Location: Reading, England Posts: 6978 Joined: 12.07.04 |
It looks a bit like a Phryxe (but again I am not 100% sure), but it isn't vulgaris (that much I am sure about) |
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| wilde |
Posted on 08-07-2008 19:46
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Member Location: Koudekerke, Netherlands Posts: 169 Joined: 13.09.06 |
Pieris brassicae larvas are parasitized by at least 5 Tachinids: Phryxe vulgaris, Compsilura concinnata, Nilea hortulana, Exorista grandis, Siphona geniculata. Could it be one of the other 4 species? Albert de Wilde |
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| wilde |
Posted on 16-07-2008 19:55
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Member Location: Koudekerke, Netherlands Posts: 169 Joined: 13.09.06 |
I saw Theo is back on the forum. Would you be so kind to look at this fly too?
wilde attached the following image:  [124.21Kb] Albert de Wilde |
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| Susan R Walter |
Posted on 18-07-2008 13:41
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 Member Location: Touraine du Sud, central France Posts: 1695 Joined: 14.01.06 |
Pieris brassicae larvas are parasitized by at least 5 Tachinids: Phryxe vulgaris, Compsilura concinnata, Nilea hortulana, Exorista grandis, Siphona geniculata. Could it be one of the other 4 species? It's not Siphona - which I am sure you will have already worked out by looking at the gallery or doing a forum search. 
Susan |
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| ChrisR |
Posted on 18-07-2008 15:00
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Super Administrator Location: Reading, England Posts: 6978 Joined: 12.07.04 |
Phryxe is still my best guess - a male nemea - but I'm not 100% sure. Doesn't look like any of the other species you listed though: obviously not Siphona (no long proboscis); obviously not Exorista grandis (the name is a clue ); Compsilura is darker and bigger and I don't think it is Nilea (m-cu is shorter then the piece of cu from m-cu to the wing-edge). |
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| Zeegers |
Posted on 20-07-2008 21:23
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Member Location: Soest, NL Posts: 7342 Joined: 21.07.04 |
I'm with Chris, Phryxe nemea male, often bred from Pieris. Apical scutellars are clearly erect (first pic), which excludes Nilea. Wing venation and lack of bristles on facial ridge indicate nemea. Theo |
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| wilde |
Posted on 01-08-2008 15:24
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Member Location: Koudekerke, Netherlands Posts: 169 Joined: 13.09.06 |
OK Theo, thanks. A last picture of this small fly (5 mm), close-up (crop) of the head. May be this confirms the species name. wilde attached the following image:  [138.42Kb] Albert de Wilde |
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| Zeegers |
Posted on 01-08-2008 18:35
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Member Location: Soest, NL Posts: 7342 Joined: 21.07.04 |
It was already confirmed, there is no doubt. Theo |
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