Diptera.info :: Family forums :: Syrphidae
 Chrysotoxum fasciolatum
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| Jef Hendrix |
Posted on 26-07-2013 12:35
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Member Location: Turnhout, Belgium Posts: 60 Joined: 17.06.11 |
A Chrysotoxum from the eastern Pyrenees near Prades (France) at an altitude of +-1500m. 12/07/2013 Can anyone help? Jef Jef Hendrix attached the following image:  [196.82Kb] Edited by Jef Hendrix on 29-08-2013 08:02 |
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| Jef Hendrix |
Posted on 26-07-2013 12:36
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Member Location: Turnhout, Belgium Posts: 60 Joined: 17.06.11 |
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Jef Hendrix attached the following image:  [174.61Kb] |
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| Sundew |
Posted on 27-07-2013 13:35
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 Member Location: Berlin and Baden-Württemberg, Germany Posts: 3939 Joined: 28.07.07 |
Indeed a female Chrysotoxum. With the key http://web.archiv...x_key.html, I arrive at Chrysotoxum cautum, as the third antennal segment seems to equal segments 1 + 2. Unfortunately, I cannot see the character: "female: unique among European Chrysotoxum in possessing a longitudinal, median, membranous strip on abdominal tergite 6, which effectively divides this tergite into two parts". Also the scutellum is unusually dark. So here I am at my wits' end! Regards, Sundew |
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| Gerard Pennards |
Posted on 27-07-2013 17:41
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 Member Location: Amersfoort Posts: 1914 Joined: 07.06.04 |
It's a female Chrysotoxum fasciolatum... :-))
Greetings, Gerard Pennards |
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| Sundew |
Posted on 27-07-2013 18:36
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Member Location: Berlin and Baden-Württemberg, Germany Posts: 3939 Joined: 28.07.07 |
Ah - in this case "Wing: front margin yellowish with a distinct dark spot in the top half; abdomen elongate; large species: 13-17 mm" is a good description in the key. As to the antenna, segment 3 has to be longer than 1 + 2 to get to Ch. fasciolatum. So my estimation was wrong  .Good to have true experts here! |
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| Jef Hendrix |
Posted on 29-08-2013 08:06
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Member Location: Turnhout, Belgium Posts: 60 Joined: 17.06.11 |
Thanks Sundew and Gerard! |
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