Andreninae. a, Face of Andrena mariae Robertson, female; b, Hind leg of Andrena sp., female, showing large floccus on trochanter and other scopal hairs on femur and tibia; c, d, T1 of Ancylandrena larreae Timberlake in dorsal and lateral views, with lines showing lengths of dorsal and anterior surfaces; e, f, Same, of Megandrena enceliae (Cockerell). From Michener, McGinley, and Danforth, 1994 (source: Michener, 2007)