482 bulletin: museum of comparative zoology. 



with faint longitudinal impression. Clypeus small, longer than broad, 

 anterior border truncate, strongly carinate at middle and depressed on 

 either side. Mandibles short and thick; bluntly dentate. Eyes 

 small, oval, rather flat, situated much posterior to middle of sides 

 of head. Antennae short, stout, the scape strongly inflexed, thickened 

 at apex, barely extending to occipital corners; funicular joints thick, 

 subequal. Pronotum as broad as long, constricted in front, the sides 

 margined, anterior border strongly margined. Sides at middle 

 straight, in front concave to apex, with an angle between ; narrowed 

 and rounded at base. Promesonotal impression distinct. INIesono- 

 tum triangular, rounded at sides, and slightly rounded above. Epino- 

 tum rounded at sides; at base with a large projection, which, seen 

 from the front, has straight sides and truncate apex; from the sides 

 this is seen to be composed of two tubercles, the one in front about 

 half as large as the other. From the apex of this spine the epinotum 

 in profile is concave to a point a little less than half the distance to 

 base, where it is armed with another projection. In profile the ante- 

 rior surface of this is convex, the posterior concave. This projection 

 is twice as high as the one anteriorly and at the apical end bifurcate 

 into two conical spines. From this to the marginate base the epino- 

 tum is concave. Petiolar node in profile thick at base and at about 

 one third the distance from base to apex strongly constricted; apex 

 and sides thinly marginate, the middle and the apex of sides with 

 conical projections; anterior surface rounded, posterior deeply con- 

 cave. Gaster elongate, sides slightly convex, the width of the first 

 three segments subequal. Legs long, rather stout. 



Head and thorax subopaque, minutely and densely punctate, 

 the punctures on mesonotum and epinotum coarser. Head and 

 pronotum with very sparse pubescence and very sparse, scattered 

 semierect pile. Mandibles shining, with coarse punctures. An- 

 tennae finely pubescent, the apex of scape with a few erect hairs. 

 Posterior surface of node coarsely striolately punctate, surface granu- 

 lar in appearance. Gaster subopaque, densely punctate, with scat- 

 tered pubescence and a few erect hairs. Tibiae with sparse recumbent 

 pubescence, but legs otherwise without hairs. 



Gaster above dark brown to black, each segment with a narrow 

 apical border of yellow; rest of body and legs ferruginous, tibiae, 

 tarsi, and antennae somewhat darker. Pile and pubescence gray. 



Worker minor. (Plate 5, fig. 40). Length 4.5 mm. 



Head narrowed anteriorly; sides in front of eyes slightly convex 

 to the anterior border, which is rounded; occipital corners very 



