Kwik-Key to Common Families of Diptera

Select "A" or "B" for your specimen:

A.   There is only one “break” in the costal margin of the wing.   This subcostal break (“sb”) is near the junction with the R1 vein.

A

B.   There are two “breaks” in the costal margin of the wing:   the humeral break (“hb”) and the subcostal break (“sb”).

B