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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Aschiza" » Hover Flies (Syrphidae) » Syrphinae » Syrphini » Allograpta » Allograpta exotica
Photo#156592
Yellow and black Syrphid Fly - Allograpta exotica - female
Copyright © 2007 Arthur Scott Macmillan

Yellow and black Syrphid Fly - Allograpta exotica - Female
Sunnyvale, Santa Clara County, California, USA
May 27, 2007

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Yellow and black Syrphid Fly - Allograpta exotica - female Yellow and black Syrphid Fly - Allograpta exotica - female Yellow and black Syrphid Fly - Allograpta exotica - female Yellow and black Syrphid Fly - Allograpta exotica - female Yellow and black Syrphid Fly - Allograpta exotica - female Yellow and black Syrphid Fly - Allograpta exotica - female Yellow and black Syrphid Fly - Allograpta exotica - female
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Contributed by Arthur Scott Macmillan on 13 November, 2007 - 6:38am
Last updated 8 May, 2013 - 4:35pm

"Pteropleura black on lowest two-thirds or more"
That's clearly the case in your image above, and that's the character in Fluke's 1942 key (and other more recent treatments) that distinguishes A. exotica from A. obliqua...for more details see remarks in the post below:



The black "anepisternum", in addition to the very clear black stripe down the middle of the face in your 1st image seems to cinch the ID of A. exotica here. Without a good view of the pteropleura/anepisternum, I believe a clear distinction between these two species can be quite difficult to make. Some of the BG posts currently placed under A. exotica may actually be A. obliqua.

Great photos!
… Aaron Schusteff, 11 May, 2013 - 1:31pm login or register to post comments

 
Thanks for the very extensive information
This fly was one of my favorite subjects. I was just beginning to see the details that a camera could capture that I had been missing out on!
… Arthur Scott Macmillan, 24 May, 2013 - 7:28pm login or register to post comments

Moved
Moved from Common Oblique Syrphid.
… Ken Wolgemuth, 8 May, 2013 - 4:35pm login or register to post comments

relative size of the fly
Those familiar with "Parrots Feather" - a pond plant, will have a good idea of how small this fly is! The individual projections like the fly's legs are on, are probably only about 2mm.
… Arthur Scott Macmillan, 21 November, 2007 - 12:39am login or register to post comments

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