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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.


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