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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Aschiza" » Hover Flies (Syrphidae) » Syrphinae » Syrphini » Toxomerus » Toxomerus marginatus
Photo#279020
Hover Flies - Toxomerus marginatus - male - female
Copyright © 2009 John Pearson

Hover Flies - Toxomerus marginatus - Male Female
Ackworth, Warren County, Iowa, USA
May 24, 2009
Size: ~6 mm
Mating on goldenrod leaf in grassy old field. Syrphids?
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Contributed by John Pearson on 24 May, 2009 - 9:21am
Last updated 23 June, 2009 - 11:02pm

Moved
Moved from Toxomerus geminatus.
… Hartmut Wisch, 23 June, 2009 - 11:02pm login or register to post comments

Yes, syrphids
Wing venation verifies that. These are Toxomerus geminatus.
… Ron Hemberger, 24 May, 2009 - 11:26am login or register to post comments

 
Must be a slip of the keyboard, Ron -
Check it out, this is T. marginatus, with the margin of the abdomen narrowly, but continuously yellow. T. geminatus's abdominal margin is alternately black and yellow, aside from other differences; see here: Toxomerus, as well as Martin Hauser's pictorial key.
… Hartmut Wisch, 23 June, 2009 - 4:34pm login or register to post comments

 
Oops. Hartmut's right, of course.
I should know better. I do! Thanks, Hartmut, for keeping me honest. Well, retroactively.
… Ron Hemberger, 23 June, 2009 - 6:42pm login or register to post comments

 
Thanks for the update
Thanks for both of you for the update. FYI, the reidentification to T. marginatus means that my photo is not the first of this species posted on BG for Iowa after all. Still a neat find for me, thanks again!
… John Pearson, 27 June, 2009 - 8:40pm login or register to post comments

 
Thanks, Ron!
All the way to species, great! This becomes its first BG data point for Iowa.
… John Pearson, 24 May, 2009 - 12:36pm login or register to post comments

 
Congrats!
Keep after those syrphids, John.
… Ron Hemberger, 24 May, 2009 - 5:14pm login or register to post comments

 
What an interesting group!
So colorful, so distinctive, so diverse!
… John Pearson, 24 May, 2009 - 5:28pm login or register to post comments

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