Genus Andrena Fabricius

Taxonomy: Mitchell 1960; LaBerge 1967, 1969, 1973, 1977, 1980, 1985, 1986, 1989; Ribble 1967, 1968, 1974; LaBerge & Bouseman 1970; LaBerge & Ribble 1972, 1975; Bouseman & LaBerge 1978.

Behavior: Andrena are predominately solitary, although some species will form communal nests (Osgood 1989). Species are often narrowly polylectic or mesolectic, but many species are oligolectic, specializing on a particular floral host taxon (Linsley 1958; Robertson 1926).