Eristalis dimidiata - Eristalis saxorum

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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Aschiza" » Hover Flies (Syrphidae) » Eristalinae » Eristalini » Eristalina » Drone Flies (Eristalis) » Subgenus Eoseristalis (Eristalis Subgenus Eoseristalis) » Eristalis saxorum

Photo#1344845

Copyright © 2017 Travis MacClendon

Eristalis dimidiata - Eristalis saxorum -

Blountstown, Calhoun County, Florida, USA
March 4, 2017
Size: 12mm

Eristalis dimidiata female I believe. On blooming Walter's Viburnum (Viburnum obovatum). I see this has been called Black-shouldered Drone Fly. This would be new for Florida in March.

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Contributed by Travis MacClendon on 7 March, 2017 - 3:05pm
Last updated 7 March, 2017 - 5:09pm

Moved

Moved from ID Request.

… Martin Hauser, 7 March, 2017 - 5:09pm

Eristalsis

Thanks!

… Travis MacClendon, 7 March, 2017 - 4:52pm

I think this is Eristalis sax

I think this is Eristalis saxorum .... female and not dimidiata.
The dark wing cloud mark; the pterostigma is not black and distinct like in dimidiata; the calypters on this specimen are much darker than on dimidiata. It lacks the greyish markings found on dimidiata abdomen.
The upper frons is totally shining black. There is a complete black band on tergite three. Thorax and abdomen have bluish reflections. I have sent it to Martin for a second opinion.

… Bill Dean, 7 March, 2017 - 4:16pm

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