54 Journal Xevv York Entomological Society, t^'o'- x>^ii- 



front, about i V2 times as long as broad ; in profile the anterior and posterior 

 declivities of the node are subequal, the former straight or very feebly concave, 

 the latter convex. Postpetiole nearly half again as broad as the petiole, broader 

 than long, subrectangular, with rounded anterior corners. Gaster elongate 

 elliptical, with feebly excised anterior border. Femora slightly swollen in the 

 middle. 



Mandibles subopaque, coarsely striatopunctate. Cheeks, pleurae, epinotum, 

 petiole and postpetiole subopaque, finely and densely punctate; cheeks and 

 clypeus also delicately longitudinally rugulose ; remainder of body very smooth 

 and shining, finely and very sparsely punctate, especially the posterodorsal 

 portion of the head, the pronotum and the gaster. 



Hairs snow white, short, delicate but clavate, sparse and erect on the 

 body ; on the appendages very minute, appressed and pointed. 



Black ; antennae and legs deep red or piceous, scapes and middle portions 

 of femora and tibiae darker. In some specimens the tarsi and articulations of 

 the legs are more yellowish. 



Female. — Length 3-3.5 mm. 



Differing from the worker in the following particulars : Head broader and 

 somewhat more rectangular. Thorax large, subelliptical from above and flat- 

 tened dorsally, the mesonotum large, the base of the epinotum only half as 

 long as the declivity, which is abrupt and concave. Petiole in profile with 

 wedge-shaped node, its anterior slope short and slightly concave, its posterior 

 slope straight and perpendicular, its superior border rounded and entire. Post- 

 petiole more distinctly rectangular than in the worker, nearly twice as broad 

 as long, very convex above and in front, depressed behind. 



Sculpture much as in the worker, bvit the front of the head longitudinally 

 striated and the nodes of the petiole smoother and more shining. 



Pilosity and color as in the worker, except that the hairs on the body are 

 pointed. Wings whitish hyaline, with pale yellow veins and conspicuous brown 

 stigma. 



Male. — Length 2 mm. 



Head through the eyes as broad as long, semicircular behind. Mandibles 

 small. Antennas short; scapes only about three times as long as the first 

 funicular joint, which is oval and less than twice as long as broad. Eyes large 

 and prominent. Thorax nearly as broad as long; mesonotum convex ; epinotum 

 depressed, sloping and unarmed. Petiole and postpetiole like those of the 

 worker; legs more slender. 



Whole head subopaque, densely and finely punctate-rugulose. Remainder 

 of body shining; thorax above finely longitudinally striated. 



Hairs very short and sparse, pointed. 



Color like that of the worker and female. Veins of wings very pale; 

 stigma as in the female, large, dark brown and conspicuous. 



Described from miiiicrous workers and females and a single male 

 taken from nests in the ijrnund beneath stones at El Chico and 



