The bees described as Panurginus Nylander, 1848, from southern South America and deposited in the Museum Humboldt, Berlin, were studied. Seven species were redescribed and trans-ferred to the genus Panurgillus Schlindwein & Moure, 1998: P. aeneiventris (Friese, 1908),P. brunneicornis (Strand, 1910), P.paraguayanus (Strand, 1910), P. pauloensis (Friese, 1916), P. saltensis (Friese, 1908), P. solani (Ducke, 1912) e P. steinbachi (Friese, 1916). A key for the identification of the 21 known species of the genus is included. Panurginus flaviceps Friese, 1916 and P. saltensis var. nigroclypeata Friese, 1908 described by Friese are synonyms of Anthrenoides meridionalis (Schrottky, 1906). Panurginus laticeps Friese, 1916 belongs to Cephalurgus Moure & Oliveira, 1962 and P. nigriceps Friese is a species of Bicolletes Friese, 1908 (Colletidae, Paracolletini).
Hymenoptera; Apoidea; Andrenidae; Panurginae; Panurgillus; South America