Key to the Families of Diptera Associated with Cow Dung

Couplet 4

Either:	Or:
4.   Wing with C continuing around margin, sometimes with a break beyond insertion of last branch of R, often weaker along hind margin	4'.   Wing with C distinctly ending at or before wing tip
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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