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Diptera.info » Identification queries » Diptera (adults)
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Conops quadrifasciatus
crex
From today, aprox 65 km NW of Stockholm, Sweden. This fly popped up when I was concentrating on another insect on this flower. Only got this mediocre shot. I think it is a Syrphid, and not a Conopid?

Edit: Changed subject (Unknown species)
Edit: Changed subject (Conops sp)
Edited by crex on 20-08-2006 11:05
 
lweit
Hello
I think, it's not a syrph, it's a species of the family Conopidae maybe Conops quadrifasciatus Degeer, 1776

Louis
Edited by lweit on 19-08-2006 17:36
 
conopid
I think it is more likely to be something like Conops flavipes - it is too dark for C quadrifasciatus. However there are probably other species in Europe that it could be.
Nigel Jones, Shrewsbury, United Kingdom
 
crex
Thanx Louis and Nigel. I've googled for photos of the Conops found in Sweden, but I have trouble seeing which one fits ...

Found in Sweden (Fauna Europaea):
Conops flavipes (Linnaeus 1758)
Conops quadrifasciatus (De Geer 1776)
Conops strigatus (Wiedemann in Meigen 1824)
Conops vesicularis (Linnaeus 1761)
Edited by crex on 20-08-2006 09:35
 
Tony Irwin
I think the black frons, silvery pleural stripes, unthickened yellow legs and large yellow theca all suggest Conops quadrifasciatus. The females are much darker than the males.
Tony
----------
Tony Irwin
 
Zeegers
I agree with Tony.
C. quadrifasciatus is very variable.
C. flavipes has always, surprisingly enough, strongly bicolorous hind femora: half yellow, half black.


Theo Zeegers
 
crex
Thank you very much T & T!
 
lweit
Hello
What means theca ?
This word is'nt in the glossary

Thank you
Louis
 
Tony Irwin
The theca is a ventral projection on the fifth abdominal segment. Together with modified seventh and eighth segments they form a clasping organ which is used to hold onto the host bee while the egg is laid. The female theca may be very large, so that it may be mistaken for a male which has smaller genitalia.
Good examples of the theca can be seen in Gerard's pictures - see http://www.dipter...hoto_id=35 and http://www.dipter...hoto_id=52.
Edited by Tony Irwin on 20-08-2006 14:14
Tony
----------
Tony Irwin
 
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11 July 2025 19:35
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