Key to the Families of Diptera Associated with Cow Dung

Couplet 23

Either:	Or:
23.   Wing with Sc complete or nearly so, ending in C or just short of it and free from R1 distally; C without a distinct humeral or subcostal break	23'.   Wing with Sc incomplete, faint and weak distally, often fused with R1 or not distinctly separate from it distally; C with both a distinct humeral and subcostal break
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First published on the Internet in 2000 by J.M. Cumming
Last updated 18 May 2006 by J.M. Cumming and G.D. Murray