Kwik-Key to Common Families of Diptera

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

A.   There is a crossvein (“A”) that separates the 2nd basal cell from the discal cell.   An anal cell (“B”) is present.

A

B.   The 2nd basal cell is merged with the discal cell.   The result is an isosceles triangle (“C”).   An anal cell is absent.

B