HENRY J. FRANKLIN. 331 



Abdomen. — Dorsum : first segment almost destitute of pile in the 

 middle, the sides covered with whitish hair ; second segment usually 

 entirely covered with black pile, sometimes with light yellow on basal 

 middle ; third segment usually entirely black ; fourth segment some- 

 times with basal portion black, but usually entirely light yellow ; two 

 apical segments black. Venter with apical margins of segments fringed 

 with pile of same color as that of queen. 



Wings. — Subhyaline ; sometimes lighter than those of queen. 



Legs. — Fore legs almost entirely black ; middle coxse, trochanters 

 and bases of femora usually with a very small amount of light hair, 

 sometimes entirely dark ; middle tibiae dark ; hind coxse, trochanters 

 and bases of femora on lower side usually with a very noticeable 

 amount of light hair ; corbicular fringes more or less strongly ferru- 

 ginous, usually with an admixture of black hairs of varying amount ; 

 anterior and middle tibiae dark. 



Male. Head. — Shaped much as in female ; face covered with a large 

 patch of usually pure pale yellow pile, this patch very nearly reaching 

 the inner margins of the eyes on either side ; occiput bearing a tri- 

 angular patch of usually pure pale yellow pile ; sides of head, behind 

 eyes, with a large amount of yellow pile. Margin of labrum usually 

 but very slightly incurved in front ; malar space distinctly less than 

 one-fourth as long as the eye ; clypeus well covered up with yellow 

 pile ; flagellum of antennae a little less than two and one-third times 

 as long as the scape ; third and fifth antennal segments subequal in 

 length, the fourth somewhat shorter than either. 



Thorax. — Much like that of worker in coloration, but with pleura 

 always yellow to bases of legs, metapleura always entirely covered 

 with yellow pile and sides of median segment having at most not a 

 very strong admixture of black hairs with the yellow on the sides ; 

 black interalar band somewhat narrower than that of worker and less 

 sharply defined. 



Abdomen .—Tior^MrQ. : segment one covered with yellow pile ; seg- 

 ment two with basal middle yellow, the rest black ; segment three 

 often entirely black, but usually with considerable yellow pile on the 

 sides, especially near the apical margin ; segment four entirely covered 

 with yellow pile ; segment five often entirely yellow, but as often with 

 considerable black hair on the middle apical portion ; segments six 

 and seven usually entirely black, but sometimes with a very slight 

 sprinkling of yellow hairs mixed with the black. Venter rather spar- 

 sely clothed with light pile. 



Genitalia. — Spathse variable, but usually much like those of B. ter- 

 narius Say (figs. 137 and 142). Claspers like those of B. ternarius 

 (fig. 65), but with squamse more suddenly wider at the base so as to 

 be very distinctly notched on the inner side instead of being evenly 

 incurved. Sagittse and uncus as in ternarius. 



TRANS. AM. ENT. SOC, XXXVIII. 



