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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Aschiza" » Hover Flies (Syrphidae) » Syrphinae » Syrphini » Dasysyrphus
Photo#633596
Syrphid fly? - Dasysyrphus - male
Copyright © 2012 Christopher Adam

Syrphid fly? - Dasysyrphus - Male
Fredericton, York County, New Brunswick, Canada
April 25, 2012
Size: 1cm
Fly was feeding in a willow catkin. It may have been a syrphid fly, but I did not see it hovering.
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Contributed by Christopher Adam on 25 April, 2012 - 1:52pm
Last updated 9 November, 2012 - 1:28pm

Hard to say - I can't tell if
Hard to say - I can't tell if the maculae on tergites 3-4 are crossing the abdominal margin or not, even in the full image.

If they are, this is probably D. venustus, since the maculae fit the description of that species (transverse, constricted slightly medially, medial edge swollen slightly) than they do for the intrudens species complex (arcuate/lunulate, U/V shape on anterior edge, constricted in the middle, large swelling on medial edge).

If they are not crossing the margin, it's more complicated; I can't see the sternites, but we can probably assume it's not pinastri by location (pinastri is in Greenland). At that point it could be D. laticaudus (excluding nigricornis by normal maculae on tergite 2 in the male, excluding pacificus and pauxillus by range).

So... venustus or laticaudus would be my guess, depending on what's going on in the edge of the abdomen.
… Kelsey J.R.P. Byers, 8 December, 2013 - 11:29pm login or register to post comments

Moved
Moved from Syrphid Flies.
… Martin Hauser, 20 May, 2012 - 12:48am login or register to post comments

Dasysyrphus sp.
Looks right, a male.
… Gerard Pennards, 5 May, 2012 - 5:47am login or register to post comments

Dasysyrphus?
Possibly Dasysyrphus.
… Christopher Adam, 26 April, 2012 - 10:19am login or register to post comments

Moved
Moved from Flies.
… John F. Carr, 25 April, 2012 - 9:18pm login or register to post comments

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