HENRY J. FRANKLIN. 93 



the legs (toward the head, however, the yellow does not reach up to 

 the level of the tegulae). Metapleura mostly or entirely clothed with 

 yellow. Sides of median segment sometimes entirely dark, but usu- 

 ally with mostly yellow pile. 



Abdomen. — Dorsum : segment one yellow; segment two mostly yel- 

 low, but with the sides bearing reddish-ferruginous pile, the sides of 

 the yellow area converging, and the ferruginous areas on each side en- 

 larging, posteriorly ; segment three sometimes very largely covered 

 with yellow pile, the yellow reaching back in the middle to the hind 

 margin of the segment for more than one-third of the length of that 

 margin, but often only the basal middle of the segment with yellow 

 pile, the remainder, in any case, being reddish-ferruginous ; segments 

 four, five and six black. Venter black. Hypopygium without median 

 carina. 



Whigs. — Moderately dark, distinctly darker than those of ephippia- 

 lus, about like those of haueri. 



Legs. — Usually black ; trochanters and bases of femora rarely with 

 a few light or yellow hairs. 



JVorker.— Much like queen, but with lighter wings ; the yellow pile 

 sometimes almost white ; the ferruginous-red pile paler than that of 

 the queen. 



Male. Head. — Face always with a noticeable admixture of yellow 

 hairs on the clypeus, this color often strongly predominating ; often 

 with this admixture of yellow continued upward to above the bases of 

 the antennffi. Occiput usually entirely black, but often with a slight 

 admixture of yellow hairs. Ventro-lateral portions of head sometimes 

 entirely dark, but usually with more or less, and often with consider- 

 able, yellow hair. Malar space somewhat longer than its width at 

 apex, about one-fifth as long as the eye. Clypeus mostly covered with 

 pile. Third and fourth antennal segments subequal in length, the fifth 

 much longer than either. 



Thorax. — Coloration of pile like that of the females. 



Abdomen. — Dorsum : coloration of the pile like that of the workers, 

 but the ferruginous pile often faded out almost to yellow. Venter 

 mostly, and sometimes entirely, dark, but often with the apical fringes 

 of most of the segments yellow ; hypopygium usually with a tawny 

 apical beard. 



Genitalia. — Outer and inner spathae much like those of B. ephippia- 

 tus. Claspers (fig. 154 and fig. 194) a good deal like those of ephip- 

 piatus, but with the apices of the branches, as seen dorsally, rather 

 more quadrate and somewhat narrower in proportion to their pre- 

 apical portions, and with the squamae having their inner margins 

 evenly incurved from base to apex and their bases considerably wider 

 than the apices of the branches. 



Wings. — Somewhat infuscate, far lighter than those of queen and, 

 as a rule, somewhat lighter than those of worker. 



TRANS. AM. ENT. SOC, XXXIX. 



