Adamon, a New Subgenus of the Genus Nomada Scopoli from Japan (Hymenoptera, Apidae)

Abstract

A newsubgenus Adamon is proposed to include two Japanese species, Nomadakoikensis Tsuneki, 1973 and Nomada arasiana Tsuneki, 1973. The new subgenus is very characteristic in having the male antennae 12-segmented. This is unusual for the bees. The male description of N. koikensis is presented. Key to the species ofthe subgenus is given.