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The Society for the study of flies (Diptera)

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#1 2011-07-10 22:55:55

bacchus
Registered user
Name: Array Array
Registered: 2011-07-10
Posts: 2

bulletin spring 2011

On page 9 there is a picture purporting to be Sphaerophoria loewi however this picture shows a species with yellow antenna not black, is this a mistake or does the female have yellow antenna as in S. rueppellii ?

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#2 2011-11-20 13:49:21

Roger Morris
DF Members
Name: Roger Morris
From: Stamford
Registered: 2008-02-08
Posts: 31

Re: bulletin spring 2011

Hi

Thanks for bringing this to our attention - Looking at the photo I'm not sure I would judge the colour of the antennae - certainly look unclear.

I did look at a couple of specimens of this species from the site in question - and they certainly had black antennae, but as you say, this one looks odd.

Regards

Roger

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#3 2011-11-30 03:20:34

John O'Sullivan
DF Members
Name: John O'Sullivan
Registered: 2008-05-19
Posts: 1

Re: bulletin spring 2011

Thanks to Roger for drawing my attention to this thread.  I can confirm that the picture in question is somewhat misleading.  Possibly as a result of reflected light, the third antennal segment does indeed look pale.  However, other pictures of the same individual, and of another female photographed in a tube at much the same time, clearly show that the antennae are entirely black in both.  The same applies to all other females and males taken at the site in 2008, 2009 and 2010.  There is nothing to suggest that this important distinguishing feature between loewi and rueppellii is not entirely reliable.  This example shows once again why identification from photographs alone needs to be done with the greatest of care.
Regards,
John

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