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Andrenidae (solitary mining bees; subclass Pterygota, order Hymenoptera) Large family of short-tongued, solitary bees. Each antennal socket is connected to the clypeus by two sutures. The tongue is pointed. The segments of the labial palps are similar, or sometimes the first or second are elongate and flattened. The coxae of the mid-leg are externally shorter than the distance from their apices to the posterior wing bases. The pollen scopa is a dense fringe of hind tibial, branched hairs, often augmented by a coxal floccus of long, curved hairs. The brood cells are lined with a wax-like secretion of the Dufour's gland.

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