Callosphecodes, a little-known bee (Hymenoptera, Halictidae, Sphecodes)

Callosphecodes Friese, 1909, a synonym or perhaps subgenus of Sphecodes Latreille, 1804, is known on the basis of one female of Sphecodes ralunensis (Friese, 1909)from New Britain and one female and one male of a similar species, Sphecodes manskii (Rayment, 1935) from northeastern Australia. The male is here described for the first time and the females of the two species are compared for the first time. In spite of considerable collecting, only these three specimens have appeared in over a century. Descriptions and illustrations are provided.