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

Abstract

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