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Melangyna sp.  (Syrphidae) in the Colorado Rockies - Melangyna

Melangyna sp. (Syrphidae) in the Colorado Rockies - Melangyna
South Divide, 9300 ft (N88.93315, W105.22150),, Teller County, Colorado, USA
June 7, 2007
Size: L=9 mm
Found on Taraxacum officinale - Dandelion. NB: females have yellow bands, males have white bands.
check here

Moved from Dasysyrphus.

Moved from Eupeodes.

Wait a second.....
After seeing this again and noticing the dark pterostigma I looked a bit better and saw it has hairy eyes. Eupeodes never have that, so this is Dasysyrphus sp.!

Gerard, are you sure? The bla
Gerard, are you sure? The black one looks like a Platycheirus and the yellow one like a Melangyna... clearly no Eupeodes and not very likely a Dasysyrphus....

I'm not sure. In fact, what you say makes a lot of sense, indeed the options Platycheirus for the female and Melangyna for the male are a much better suggestion than my Dasysyrphus....

Moved from Syrphid Flies.

Eupeodes sp.

Moved from Flies.

Moved from ID Request.

Scaeva looks good, perhaps S. selenitica

Disclaimer: This is the only example of S. selenitica we have, plus I have no experience with the species.

This one is not S. pyrastri or its near twin Eupeodes. (Both have whiter markings in different shapes.)

Suggest this post be moved to Flies (Diptera) for expert attention.

Scaeva pyrastri
Cumuseum lists only

Genus Scaeva
Scaeva melanostoma (Macquart 1842)
Scaeva pyrastri (Linnaeus 1758)

no S. selenitica

Ah. Perhaps the one we have there is wrongly IDed.
There's a link missing in that post. I've asked for clarification. Note that we have an expert ID for that one, plus the mention that it's an introduced species. (I haven't found any range info.)

Note: The photo referenced in the body of this post has a heavy color cast. I can't read German, so I have no comment on the text.

Here's a female S. pyrastri with white stripes. I didn't check further.

I'm done with this. Adalbert, I hope you draw some expert commentary.

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