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Abstract: A new species of
Physoconops Szilady,
P. (Pachyconops) weemsi, is described from Florida and Georgia. It is similar to two other species in the southeastern United States,
P. floridanus Camras and
P. brachyrhynchus Macquart, the main differential character being the shape of the female theca. The female thecae for all three are illustrated and a key to the three related
Pachyconops species occurring in the southeastern United States is presen