Abstract
Morphology and distributional patterns of antenna1 sensilla were compared between four species in three genera of Sphecidae. Sensilla placodea have plates that are raised to resemble low domes in Argogorytes mystaceus and A. fargei or low pegs in Bembix rostrata and Cerceris rybyensis. Sensilla basiconica occur in both sexes of Bembix and Cerceris, but, similarly to Apidae (s. laf.), only in females of Argogorytes. The antennae of the two species of Argogorytes differ primarily in being larger in A. mysfaceus, thus permitting space for more sensilla. In Bembix rostrata, the male antennae are adapted to function as ‘gripping’ organs.
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