Key to Females of the Genera of Brachycistidinae

1 Hindcoxa with longitudinal carina on inner margin (Fig. 2); occipital carina ventrolaterally angulate (Fig. 1) ................................................................... Colocistis Krombein

­ Hindcoxa without longitudinal carina on inner margin; occipital carina ventrolaterally

evenly curved ................................................................................................................ 2 2 Scape apicolaterally lobed (Fig. 11); occipital and hypostomal carinae widely separated, separation as long or longer than length of hypostomal fossa; occipital carina obsolescent ventrally .................................................. Stilbopogon Mickel & Krombein

­ Scape cylindrical, not apicolaterally lobed (Fig. 12); occipital and hypostomal carinae usually separated by less than length of hypostomal fossa; occipital carina complete ventrally....................................................................................................................... 43

3 Mandible with inner margin below largest laterally projecting subapical tooth serrate or with three or more small teeth (Fig. 6) ........................................... Brachycistis Fox

­ Mandible with inner margin below largest laterally projecting subapical tooth smooth, without serrations or small teeth (Figs. 7, 9, 10)........................................................... 4

4 Mesopleuron strongly convex medially in dorsal view (Fig. 3); maxillary palpus about as long as hypostomal fossa .........................................Glyptacros Mickel & Krombein

­ Mesopleuron nearly flat or slightly concave medially in dorsal view (Fig. 4); maxillary palpus minute, considerably shorter than hypostomal fossa ............................. Genus A