A new species of mining bee (Hymenoptera: Andrenidae: Andrena) from northern Thailand

A new species of mining bee, Andrena (Cnemidandrena) igali sp. n., is described from the mountainous province of Mae Hong Son in northern Thailand, near the border with Myanmar. The species represents a rare and unusual penetration of the subgenus Andrena (Cnemidandrena) into subtropical–tropical climate areas, with a characteristic shift in the flight period. Andrena igali sp. n. is a part of an eastern clade of A. (Cnemidandrena) known as the mephistophelica species group, which exhibits distinctive adaptations for pollen transport, with almost nothing known about its foraging biology. It is the third species of Andrena reported from Southeast Asia, which constitutes the southeasternmost edge of the distribution of the genus.