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Dear Ximo,<br>
<br>
According to me, there is nothing so odd: this "hole" is simply
caused by the wet and dark proboscis, when pulled up into to buccal
cavity, it (or more precisely the membrane which links it to the
head tegument) touches the face tegument (which is more or less
transluscent) inside and leads to this dark patch on the knob. <br>
I hope that it is nothing more complicated than that!<br>
<br>
Best regards,<br>
Jean-Pierre<br>
<br>
<br>
Le 12/05/2011 03:37, ximo mengual sanchis a écrit :
<blockquote
cite="mid:BANLkTi=C13gLX4mryH=-KHFNfX+W5WHJTQ@mail.gmail.com"
type="cite">Dear friends,<br>
<br>
I'm not a big fan of these things but this forum has an
interesting gif image (animated picture). My friend Keith sent me
the link of a flower fly (Epistrophe eligans) with a weird "visual
efect". There appears to be a mobile hole in the fly's face that
opens when it moves its proboscis, the gif is mesmerizing and a
little grotesque. What do you think caused this?<br>
<div class="gmail_quote"> <br>
<a moz-do-not-send="true"
href="http://www.fredmiranda.com/forum/topic/1005789"
target="_blank">http://www.fredmiranda.com/forum/topic/1005789</a><br>
<br>
<br>
Best regards,<br>
<br>
Ximo<br>
<br>
</div>
<br clear="all">
<br>
-- <br>
******************************************************** <br>
Dr. Ximo Mengual <br>
Department of Entomology<br>
Smithsonian Institution<br>
PO Box 37012, MRC-0169<br>
Rm CE-607<br>
Washington, D.C. 20013-7012<br>
Phone: +1 (202) 633-1004<br>
e-mail: <a moz-do-not-send="true" href="mailto:mengualj@si.edu">mengualj@si.edu</a><br>
<a moz-do-not-send="true"
href="http://entomology.si.edu/StaffPages/MengualJ.html">http://entomology.si.edu/StaffPages/MengualJ.html</a><br>
<br>
For FEDEX:<br>
Smithsonian Institution<br>
National Museum of Natural History (NHB)<br>
Department of Entomology<br>
10th & Constitution NW<br>
Phone: +1 (202) 633-1004<br>
Washington, DC 20560-0169 <br>
<br>
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