Fly - Orthonevra - BugGuide.Net

weemsi or pictipennis

Orthonevra weemsi or pictipennis. I can't tell from this picture.

… John F. Carr, 23 October, 2011 - 6:00pm

replaced with larger picture

Maybe this helps, even though part of the fly isn't in focus.

… tom murray, 23 October, 2011 - 7:14pm

Legs

The best difference between the species is the color of the fore tibia. "In pictipennis, the medial two-thirds of the distal surface of the tibia is black and the basitarsus may show this same feature, while in weemsi, the red tibiae may be darkened medially, never exhibit black or purple markings." The tibia here is at least darkened. I'm not sure if it's black.

Aside from that, pictipennis has a much hairier face (visible here) while weemsi has a shorter second antenna segment (visible here). The spots on the face have different shapes.

… John F. Carr, 23 October, 2011 - 7:28pm

Sounds confusing

as if this has features of both species.

… tom murray, 23 October, 2011 - 8:06pm

Moved

Moved from Orthonevra.

… tom murray, 31 March, 2011 - 7:29pm

Orthonevra

This is a syrphid fly, genus Orthonevra. The larvae are aquatic.

… Martin Hauser, 27 May, 2006 - 1:24am

Thanks Martin

I've seen these before, but couldn't remember.

… tom murray, 27 May, 2006 - 7:12am