Key to the Families of Diptera Associated with Cow Dung

Couplet 15

Either:	Or:
15a.   Wing with Rs originating at or near level of crossvein h; Sc curved posteriorly and fused with R1	15a'.   Wing with Rs originating distad of level of crossvein h; Sc not curved posteriorly, either ending freely, or gradually converging with R1 near C
15b.   Usually metallic green coloured flies	15b'.   Colour variable, not metallic green
Dolichopodidae	Empididae

First published on the Internet in 2000 by J.M. Cumming
Last updated 18 May 2006 by J.M. Cumming and G.D. Murray