primarily tropical group, most diverse in the Old World; in our area, the native P. pallipennis widespread in the east (e. US + so.ON), the adventive P. nigriceps widespread in the east and in OR-CA(1)
Contributed by Jim McClarin on 2 October, 2005 - 1:23pm Additional contributions by Bbarnd, v belov Last updated 8 January, 2015 - 6:45pm
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