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View Thread :: Identification queries :: Diptera (adults)
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Bibio hortulanus ?
#1 Print Post
Posted on 14-04-2006 20:17
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Location: Paris (France)
Posts: 1293
Joined: 21.04.05


Seen today 14th April 2006, Paris, 7-9 mm. At first sight, I thought that Bibio marci was really small this year (with the late spring?). Later on, I saw the single black cell on the wings.

I'm wrong with B. hortulanus?
pierred attached the following image:

Edited by pierred on 14-04-2006 20:18
Pierre Duhem
#2 Print Post
Posted on 15-04-2006 13:30

Location: Soest, NL
Posts: 14376
Joined: 21.07.04

Bonjour Pierre,

B. hortulanus has legs all black, as does marci.
This is B. johannis, one of the most early spring species.
Easily recognized by the very dark pterostigma, as you correctly observed.
And of course the reddish tibiae (as lanigerus, etc...)

Theo Zeegers
#3 Print Post
Posted on 15-04-2006 17:07
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Location: Paris (France)
Posts: 1293
Joined: 21.04.05


Thanks a lot for the correction and for the reasons why.
Pierre Duhem
Gordon Jar
#4 Print Post
Posted on 16-04-2006 14:47

Location: East Sussex, England
Posts: 182
Joined: 09.10.05

The attached was photographed in South East England on 13/04/06. Would this also be B. johannis. It seems to fit the description as set out above.

Gordon Jar attached the following image:

#5 Print Post
Posted on 16-04-2006 16:54

Location: Soest, NL
Posts: 14376
Joined: 21.07.04

No, this is not johannis, most likely the other very common species: lanigerus. Why ?
the stigma is brown, not black.
Johannis is easy to recognize in the field: all hairs on both thorax and abdomen are black. In lanigerus many hairs are light.
But I can't see this feature on the pictures.

Gordon Jar
#6 Print Post
Posted on 16-04-2006 17:01

Location: East Sussex, England
Posts: 182
Joined: 09.10.05

Thankyou very much for the useful explanation.

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