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Diptera.info :: Family forums :: Asilidae Forum
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Pupa from Warbler nest
Holenester
#1 Print Post
Posted on 15-12-2018 18:36
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Hi,
I found this pupae burrowed among nest material of Wood Warbler nest. Is it Asilidae?
Holenester attached the following image:


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Edited by Holenester on 15-12-2018 18:43
 
Holenester
#2 Print Post
Posted on 15-12-2018 18:37
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Another view:
Holenester attached the following image:


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Edited by Holenester on 15-12-2018 18:44
 
Holenester
#3 Print Post
Posted on 15-12-2018 18:39
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Ans last one, more focused on the head part:
Holenester attached the following image:


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Edited by Holenester on 15-12-2018 18:44
 
Tony Irwin
#4 Print Post
Posted on 16-12-2018 12:42
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Looks like it. Normally asilid larvae are found in soil, so I'd say this ended up in the nest accidentally. I assume the wood warbler was ground-nesting, as is usual for the species.
Tony
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Tony Irwin
 
Quaedfliegh
#5 Print Post
Posted on 16-12-2018 19:00
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Could it be a Rhagionidea?
Greetings,

Reinoud

Field guide to the robber flies of the Netherlands and Belgium: https://www.jeugdbondsuitgeverij.nl/product/field-guide-to-the-robberflies-of-the-netherlands-and-belgium/

https://www.nev.nl/diptera/
 
Mariastraat 12
Holenester
#6 Print Post
Posted on 16-12-2018 19:14
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I still have this pupa, preserved in alcohol. I may put here additional photo, if there is a chance to id to the family level.
 
Quaedfliegh
#7 Print Post
Posted on 17-12-2018 17:44
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I hope more colleagues will have a look at it. Usually pupae of the Asilidae have more projections at the head, but I could find one illustration in Melin 1923 of a pupa of Leptogaster cylindrica which only has two projections, similar to this one.
Greetings,

Reinoud

Field guide to the robber flies of the Netherlands and Belgium: https://www.jeugdbondsuitgeverij.nl/product/field-guide-to-the-robberflies-of-the-netherlands-and-belgium/

https://www.nev.nl/diptera/
 
Mariastraat 12
Holenester
#8 Print Post
Posted on 17-12-2018 21:28
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On these pictures two additional projectors (below these huge) are visible. Maybe this could be useful.
Holenester attached the following image:


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Holenester
#9 Print Post
Posted on 17-12-2018 21:29
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And another perspective:
Holenester attached the following image:


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Even Dankowicz
#10 Print Post
Posted on 13-01-2019 20:48
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This appears to be a member of Therevidae. The supra-alar processes are elongate, whereas they are truncate and resemble a short carina in Asilidae. Furthermore, note the laterally-protruding antennal sheaths (these are more posteriorly directed in Asilidae) and the slender posterior processes, which are thickened and thornlike in Asilidae.

Stubbs & Drake 2001 have a good key to families of British pupae, and in this case its diagnosis would have been correct (it doesn't always work in other parts of the world).

I wouldn't be surprised if somebody more familiar with Therevidae could identify this further.
 
Paul Beuk
#11 Print Post
Posted on 18-01-2019 10:07
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May I suggest Scenopinidae? Perhaps also more likely to be found in a bird's nest?
Paul

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Even Dankowicz
#12 Print Post
Posted on 25-01-2019 05:08
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I recall reading somewhere that elongate supra-alar processes like we see here are limited to Therevinae (which has certainly been my experience with specimens). I'll see if I can find the reference soon.
 
Paul Beuk
#13 Print Post
Posted on 29-01-2019 12:55
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Comparing with Manual of Nearctic Diptera I concur with Therevidae.
Paul

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