HENRY J. FRANKLIN. 403 



Male. Head — Clothed as in queen, but usually with more or less 

 very dark grayish pile about bases of antennae, over clypeus and on 

 ventro-lateral surfaces. Malar space longer than its width at apex, 

 about one- fourth as long as the eye; clypeus, except middle of ante- 

 rior part, usually pretty well covered up with pile ; fiagellum of an- 

 tenna about four times as long as scape, its middle segments usually 

 appearing somewhat arcuate when viewed laterally (fig. 17); fifth an- 

 tennal segment much longer than the third, the third slightly longer 

 than the fourth. 



Thorax.— h.n\.Qr\or part of the dorsum as in queen ; a black band of 

 considerably varying width between the bases of the wings ; scutellum 

 sometimes entirely dark, but much more often well covered with yellow 

 pile; mesopleura sometimes as in queen, but usually with a greater 

 portion bearing yellow pile and sometimes entirely covered with it to 

 the bases of the legs (this variation sometimes occurs in specimens 

 from the same nest); metapleura sometimes entirely dark, sometimes 

 entirely light (also in specimens from same nest); sides of median seg- 

 ment usually covered with light pile, but sometimes with dark. 



Abdomen. — Dorsum : segment one usually entirely yellow, but some- 

 times with basal portion having a strong admixture of black hairs with 

 the yellow (this variation often occurs in the same nest) ; segments 

 two, three and four entirely yellow; segment five entirely black, entirely 

 yellow, base yellow and apical portion black, or base yellow and apical 

 portion ferruginous ; segment six entirel}'' black, entirely ferruginous, 

 yellow and ferruginous mixed, black and ferruginous mixed, entirely 

 yellow, or yellow and black mixed ; segment seven black, ferruginous, 

 or black and ferruginous mixed, but usually with more or less ferrugiu- 

 ous pile. Venter sometimes entirely black and usually mostly black, 

 but the hairs fringing the apical margins of the segments often with 

 a more or less strongly light or ferruginous tinge, and the extreme 

 sides of the middle segments (really the ends of the corresponding dor- 

 sal segments) often pretty well covered with yellow pile. 



Genitalia. — Outer spatha ( fig. 126) long, its anterior lateral projections 

 long and rounded at the end, anterior margin deeply and evenly in- 

 curved, posterior margin broadly and evenly rounded, each side of 

 ventral surface with a scattering patch of rather long hairs. Inner 

 spatha (fig. 132) long, its apical portion square at the tip and con- 

 stricted slightly a little ways in front of it ; a single large, long, central 

 fenestra present ; ventral surface of apical portion bearing rather short 

 hair all the way across. Claspers (figs. 66 and 70) as already de- 

 scribed for the group. Heads of sagittae more elongate, less shell-like, 

 than those of B. californicus and fervidus (compare fig. 102). Geni- 

 talia as a whole not separable, by any noticeable character, from those 

 of B. sonorus Say. 



Wings. — Usually somewhat lighter than those of the worker, much 

 lighter than those of the queen. 



TRANS. AM. ENT. SOC, XXXVIII. 



