HENRY J. FRANKLIN. 391 



Abdomen. — Dorsum : first four segments entirely covered with yellow 

 pile; segments five and six black. Venter black. Hypopygium with- 

 out a median carina. 



Wings. — Very strongly stained with brown ; the fore pair lightest 

 in and around the third cubital and the apical half of the third dis- 

 coidal cell, darkest in the median, submedian, basal portion of second 

 discoidal and anterior portion of radial cell. 



Legs. — Coxae, trochanters, femora and tibiae dark. 



Worker. — Like the queen, but with wings usually lighter ; meta- 

 pleura and sides of median segment often bearing only light pile. 



Male. Head. — Shaped much like that of queen ; face usually, and 

 ventro-lateral portions sometimes, with a very faint sprinkling of yellow 

 hairs (only noticeable with a lens), otherwise black. Malar space 

 much longer than its width at apex, about one-third as long as the 

 eye. Clypeus largely naked and usually with a somewhat larger smooth 

 area on the anterior median portion than in the queen. Flagellum of 

 antenna from three and one-half to four times as long as scape ; third 

 antennal segment distinctly shorter than the fifth, the fourth shorter 

 than the third. 



Thorax. — Like that of the queen, in coloration of pile, but with the 

 pleura always entirely covered with light pile to the base of the legs ; 

 sides of median segment usually with light, but sometimes with dark 

 pile. 



Abdomen. — Dorsum : first five segments entirely covered with yellow 

 pile ; segment six sometimes entirely black, but usually with a little 

 yellow on the basal middle ; segment seven entirely black. Venter 

 mostly black, but usually with considerable light pile on the sides of 

 the middle portion. 



Genitalia. — Outer spatha much like that of B. pennsylv aniens (fig. 

 126). Inner spatha (fig. 101) with apical portion quadrangular and 

 with ventral surface of sides and tip, of this portion, bearing moderately 

 long hairs ; no fenestrse present ; lateral margins broadly and evenly 

 incurved. Claspers and sagittse as in B. californicus (figs. 78 and 

 102). 



Wings. — Not very deeply stained with brown, much lighter than 

 those of queen ; the fore pair darkest in the region beyond the veins. 



Legs. — Coxae sometimes entirely dark and sometimes with a little 

 light pile; trochanters sometimes entirely dark, but usually with a 

 small amount of, and often with much, light hair ; fore femora some- 

 times entirely dark, but usually with considerable light pile, especially 

 on the basal portion of their lower sides ; middle and hind femora 

 always with a large amount of light yellow pile throughout, or nearly 

 throughout, their entire length ; tibiae black, outer faces of hind pair 

 convex and hairy, their fore and hind fringes very short ; posterior me- 

 tatarsi with no long hind fringes. 



TRANS. AM. ENT. SOC, XXXVIII. 



