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The position of supra-alars
#1 Print Post
Posted on 19-07-2010 05:45

Location: Turku, Finland
Posts: 208
Joined: 10.12.04

May I ask a terminological question?

Supra-alar bristles on thorax keep appearing in keys now and then, but I must confess that it has never been clear to me to which bristles that term actually refers.

They have been illustrated in the Sciomyzidae-volume in the FES-series, but in that picture the wing is missing.

And yesterday while checking some empidids, my problem returned with the genus Rhamphomyia .

So, where are these bristles exactly situated compared to the wing base and the rest of thorax, could anybody here please tell?

Thanks in advance.
#2 Print Post
Posted on 19-07-2010 09:35
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Location: Reading, England
Posts: 7699
Joined: 12.07.04

If you look down on the fly dorsally you will see longitudinal rows of bristles along the scutum. The most central pair are the acrostichals ... then working out you come to the dorsocentrals, intra-alars and then supra-alars Smile So they are the row of bristles closest to the wing base.
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London.
#3 Print Post
Posted on 19-07-2010 10:12
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Posts: 139
Joined: 21.08.04


Please find attached a modified figure taken from Volume 1 of the Manual of Nearctic Diptera in order to give you a better idea where to look for....

so long,
xylo attached the following image:

Paul Beuk
#4 Print Post
Posted on 19-07-2010 12:28
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Location: Netherlands
Posts: 19226
Joined: 11.05.04

I added the sa to the Glossary. Wink

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Paul Beuk on
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