The genus Stelis comprises a colorful group of parasitic Anthidiine bees that are seldom encountered or collected at floral resources. Adult females spend most of their time searching for hosts or waiting near host nests until they are available for parasitism. Like their parasites, all hosts are in the family Megachilidae. Herein, we discuss 65 North American species in this Holarctic genus, including 33 new species, and phylogenetically analyze the group with respect to morphological characters, host, and host nest characteristics.
Species 1: Hymenoptera Megachilidae Stelis
Keywords: parasites, Anthidiine bees
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