Subgenus

Psithyrus (Cuckoo bumble bees)

Bombus insularis. Photo: (c) Liz Osborn, some rights reserved (CC BY-NC)

Cuckoo bumblebees are members of the subgenus Psithyrus in the bumblebee genus Bombus. Until recently, the 29 species of Psithyrus were considered to constitute a separate genus. They are a specialized lineage which has lost the ability to collect pollen and to rear their brood. They have lost the worker caste and produce only sexuals, male and female. They are inquilines in the colonies of other bumblebees. Before finding and invading a host colony, a Psithyrus

— Wikipedia

Subtaxa

Where in Humboldt



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