Panurgillus, a generic name used by J.S. Moure throughout various years in litt. as a substitue of Panurginus in the Neotropical Apifauna, is formally described. All specimens of the species here described were collected during surveys of bees and melittophilous plants in th state of Rio Grande do Sul, southem Brazil. Various species of Panurgillus also occur in other states of southem Brazil, in Argentina and probably in Uruguay, Paraguay and Eastem Bolivia. The bees are small (3,9-7,4 mm), black, with generally a few yellow paintings, two submarginal cells, the lst m-cu distant to the base of the second submarginal cell, the clypeus not projected, the facial foveae distinct, scopa with simple, long hairs and the gonobase absent. Panurginus vagabundus Cockerell, 1918 is transferred to Panurgillus as the type species and thirtcen new species are described: P. eustictus, P. flavitarsis, P. formosus, P. guariticola, P. hamatus, P. harterae, P. holostictus, P. malvcicearum, P. minutus, P. pereziae, P. plumosulus, P. politus and P. reliculatus. From some structures were took SEM photographs.
Hymenoptera; Apoidea; Andrenidae; Panurginae; Panurgillus; bee systematics; southem Brazil