Key to the Families of Diptera Associated with Cow Dung

Couplet 22

Either:	Or:
22a.   Hind tarsus with first tarsomere distinctly swollen and short	22a'.   Hind tarsus with first tarsomere not distinctly swollen or short
22b.   Small dark brown to black dull-coloured flies	22b'.   Size and colour variable
Sphaeroceridae	Go to 23

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