HENRY J. FRANKLIN. 275 



smooth ; shelf-like projection rather wide and prominent ; translucent 

 areas faint or absent. Malar space scarcely as long as its width at 

 apex, about one-sixth as long as the eye. Clypeus rather finely punc- 

 tate. Flagellum of antenna about one and four-fifths times as long as 

 the scape ; third antennal segment longer than the fifth, the fifth longer 

 than the fourth. 



Thorax. — ^Anterior part of dorsum covered with yellow pile, the 

 yellow often reaching down onto the mesopleura considerably below 

 the level of the bases of the wings ; the remainder entirely black, ex- 

 cept the scutellum often more or less yellowish and occasionally en- 

 tirely yellow. 



Abdomen. — Dorsum : segments one and four entirely black ; seg- 

 ments two and three yellow; segment five mostly black, but the apical 

 margin always, and occasionally the whole apical half , bearing whitish 

 yellow pile ; segment six mostly black, but with more or less whitish 

 yellow pile on the sides. Venter mostly black, the apical fringe of 

 the preapical segment always more or less strongly ferruginous. 



Wings. — Rather dark ; the fore pair lightest across the middle por- 

 tion. 



Legs. — Dark ; the corbicular fringes often more or less ferruginous. 



Worker. — Much like the queen ; the wings as a rule somewhat 

 lighter ; the face and scutellum rarely with any yellow hair mixed with 

 the black. 



Male. Head. — Shaped much like those of the females. Face often 

 with a patch of unmixed dull yellow pile reaching down from the 

 bases of the antennae and covering the clypeus, but more often with 

 black and yellow pile mixed in this region and usually with a sprink- 

 ling of yellow hairs about and above the bases of the antennae. Occi- 

 put sometimes with yellow pile and occasionally with black, but usu- 

 ally with yellow and black mixed. Cheeks usually entirely black, but 

 sometimes with a little yellow pile. Malar space about one-fifth as 

 long as the eye. Clypeus mostly covered up with pile. Flagellum of 

 antenna about two and one-third times as long as the scape ; third 

 antennal segment and fifth subequal in length, the fourth shorter than 

 either. 



Thorax. — Coloration of pile much like that of the queen, but the 

 yellow pile often extending two-thirds of the way down on the meso- 

 pleura toward the bases of the legs. 



Abdomen. — Dorsum: coloration of pile much like that of the fe- 

 males ; fifth segment sometimes entirely black and sometimes with the 

 apical margin fringed with light ferruginous pile ; sixth segment rarely 

 entirely black, usually at least the apical half ferruginous and occa- 

 sionally the entire segment ferruginous ; apical segment usually with 

 entirely light ferruginous pile. Venter usually mostly dark, but occa- 

 sionally with mostly light pile, always with a sprinkling of light hairs. 



Genitalia. — As already described for the group. Sagitta with a flar- 



TRANS. AM. KNT, SOC, XXXVIII. 



