Posted by John Carr on 17-06-2015 09:33
#2
Both sexes of Chaoboridae have more than 10 segments in the flagellum. Most female Chironomidae have less than 10.
The odd shape (for Chironomidae) reminds me of
Omisus. The American species has darker legs than your fly. I do not have a description of
O. caledonicus (Edwards), the European species.