704 Bulletin American Museum of Natural History. [Vol. XXIII, 



narrowed in front, broadly and obtusely excised behind, with rounded posterior 

 corners and slightly convex sides. Eyes convex, less than J the distance from the 

 anterior to the posterior corners. Mandibles rather convex, with several blunt 

 teeth. Clypeus concave in the middle, with two very short, blunt teeth on the 

 anterior margin. Frontal carinse with expanded, toothed lobes in front. Frontal 

 area obsolete. Antennal scapes reaching to the posterior corners of the head, some- 

 w^hat incrassated towards their tips. Lateral caringe with a short, acute tooth. Post- 

 ocular spines absent ; anterior and superior occipital regions with a number of short 

 teeth or spines; posterior occipital region with a longer acute spine on each side. 

 Pronotum with a pair of short, downwardly directed inferior and a pair of long, robust 

 and acute superior spines directed forward and outward. Mesonotmn with two 

 pairs of spines, the anterior about half as long as the superior pronotal pair, but 

 more rapidly tapering and directed upward and backward; the posterior pair smaller 

 and closer together. Epinotmn with two spines which are nearly as long as the 

 superior pronotal pair but more slender and directed iDackward, upward and slightly 

 outward. Petiole longer than broad, its node subrectangular, with four equidistant, 

 subequal teeth in a transverse row. Postpetiole nearly twice as broad as the petiole, 

 broader than long, concave above, with six short bidentate spines, four in a trans- 

 verse anterior row and two behind and more widely separated at their bases. Gaster 

 broadly elliptical, broadest behind the middle; basal segment with a median longi- 

 tudinal depression, on each side of which there are several acute tubercles, longest 

 near the anterior and lateral margins. 



Mandibles shining, coarsely punctate and striate; remainder of body, including 

 the legs and scapes, opaque, densely punctate. Head, thorax, pedicel and anterior 

 border of gaster vermiculately or reticulately rugulose. Basal gastric segment with 

 scattered, shallow foveolse. 



Hairs brown or tawny, suberect, not very abundant, rather .short, curved or 

 hooked on the body, straighter on the scapes and legs. 



Ferruginous brown; borders of mandibles and anterior border of clypeus black. 



Female. Length: 8 nnn. 



Head resembling that of the worker, but the posterior corners are more acute 

 and the antennal scapes are longer. Pronotum with two broad and rather blunt 

 inferior and two acute superior spines, which are directed forward and outward. 

 Scutellvmi trapezoidal with bidentate posterior edge. Epinotal spines long, curved 

 and diverging, of nearly uniform thickness up to their rapidly tapering tips which 

 are bent downwards. Petiole and postpetiole similar to those of the worker, but 

 the median pair of teeth in the former longer than the lateral pair and the spines on 

 the postpetiole reduced to small teeth. Gaster pyrifonn, with the first segment 

 flattened above and without the pointed tubercles. 



Mandibles and legs shining; remainder of body opaque. Head coarsely, densely 

 and crenately rugose, the mgse being longitudinal on the sides but diverging from 

 the front and median line on the upper surface. Thorax covered with rvigse similar 

 to those on the head, transverse on the pronotum, longitudinal on the mesonotum 

 and pleurae, and irregular on the scutellum. Pedicel and gaster densely and irregu- 

 larly rugulose; on the middle of the first segment of the latter the rugulse are more 

 regular and longitudinal. Antennal scapes and legs coarsely punctate and more 

 or less roughened. 



Pilosity like that of the worker. 



