The Andrenidae are one of the four bee families that contain some crepuscular species; these species are active only at dusk or in the early evening, and therefore technically considered "vespertine". In the Andrenidae, such species occur primarily in the subfamily Panurginae. These bees, as is typical in such cases, have greatly enlarged ocelli, though one crepuscular subgenus of Andrena has normal ocelli. The other families with some crepuscular species are Halictidae, Colletidae, and Apidae.
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