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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Flies (Diptera) » Aschiza » Syrphid Flies (Syrphidae) » Eristalinae » Milesiini » Spilomyia » Spilomyia sayi
Photo#18384
S. sayi - Spilomyia sayi
Copyright © 2004 bev wigney

S. sayi - Spilomyia sayi
K&P Trail near Snow Road Station, Frontenac: North Frontenac, Ontario, Canada
August 13, 2004
found on goldenrod near UTM 18T 0375286, 4969870 (WGS84).

I've filed this and another image under Spilomyia, although I see an S. sayi filed under S. quadrifasciata along with a discussion of the species name. Not sure where this image should be, but I'll put it here for now.
Images of S. sayi and note about name of S. quadrifasciata appear on the Canadian National Collections of Insects, Arachnids and Nematodes website.
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Contributed by bev wigney on 27 May, 2005 - 1:48pm
Last updated 28 May, 2005 - 1:01am

S. sayi
I've changed the species name to sayi on the page you mentioned (wasn't allowed to do that at the time of the original discussion).
The Field Guide to Flower Flies of Ontario shows four characters that distinguish this species, and all four can be seen in your photo: black scutellum with very narrow yellow rim, antennae as long as face, tergite 2 with single anterior yellow band, and tergite 3 with single medial yellow band. S. fusca lacks all of those characters. An Excel file shows 2 other Spilomyia species on the Ontario list but they're less common, and if they closely resembled S. sayi I'm sure the Ontario Guide would have stated that. So I would definitely call this one S. sayi.
… Robin McLeod, 28 May, 2005 - 12:48am login or register to post comments

 
moved to new category
Thanks, Robin,
I've just moved the two photos into the category for S. sayi. Agreed on the ID too. - bev
… bev wigney, 28 May, 2005 - 1:06am login or register to post comments

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