80 bulletin: museum of comparative zoology. 



Head rectangular, slightly longer than broad, nearly as broad in front as 

 behind with feebly excised posterior border and a large shallow impression 

 on each side of the vertex. Eyes small, near the middle of the sides, ocelli 

 very small, the anterior distirctly larger than the posterior. Mandibles large, 

 with nearly straight external borders, the apical borders broad, deeply and 

 arcuately excised in the middle, with three large, subequal teeth at the apical 

 and three smaller, blunt teeth at the basal end of the excision. Clypeus very 

 short on the sides, rather flat in the middle, with a narrow elongation back- 

 ward between the frontal carinae, the anterior border straight and entire. 

 Frontal area obsolete; frontal carinae well-developed, nearly half as long as 

 the antennal scapes, slightly diverging behind, nearly as far apart as their 

 distance from the lateral border of the head. • Antennae short, 12-jointed, 

 the scapes strongly curved at the base, their tips reaching only to the posterior 

 orbits; the funiculi with a 3-jointed club; joints 2-5 broader than long, joint 

 6 as long as broad, the remaining joints longer than broad. Thorax rather 

 small, as broad as the head, the pronotum with submarginate sides and bluntly 

 rectangular humeri, the mesonotum flattened above, as long as broad, pro- 

 longed in the middle anteriorly; the epinotum short, in profile evenly rounded 

 and moderately convex, without distinct base and declivity, concave in the 

 middle behind between a pair of slight swellings representing the denticles of 

 other species. Petiole from above regularly rectangular, 1| times as long as 

 broad, as broad in front as behind, with sharp anterior and posterior angles; 

 in profile, with a node as high as the segment, its anterior surface concave, its 

 posterior convex, the summit blunt and rounded ; the lower surface anteriorly 

 produced as a large protuberance translucent in the middle, and tipped with 

 a small, blunt tooth. Postpetiole subrectangular, with convex sides and 

 dorsum, slightly broader than long and broader than the petiole, its ventral 

 surface with a large, thick, pointed, downwardly directed tooth at the anterior 

 end. Gaster elongate elliptical, narrowed anteriorly and posteriorly. Legs 

 with much thickened femora and clavate tibiae. Wings nearly 8 mm. long, 

 narrow, with a single cubital and a small, narrow discoidal cell; radial cell 

 open; pterostigma small but distinct. 



Very shining; mandibles sparsely punctate, sharplj' longitudinally striate 

 along the external borders and at the tip. Clypeus uneven but not rugose. 

 Cheeks and anterior f- of head above, longitudinally and rather densely rugose, 

 with interspersed punctures; occipital region and sides of gula with coarse, pihg- 

 erous punctures. Pronotum coarsely and sparsely punctate, indistinctly striate 

 on the sides. Mesonotum finely, longitudinally rugose behind, anteriorly 

 smooth in the middle and coarsely and sparsely punctate on the sides. Scutel- 

 lum and sides of epinotum sharply, longitudinally rugose, the former smooth 

 and more or less coarsely punctate in the middle. Slope of epinotum, petiole, 

 postpetiole, gaster, scapes, and legs very smooth and shining, with sparse 

 piligerous punctures; lateral and ventral portions of petiole and postpetiole 

 densely and finely punctate. 



Hairs slender, pointed, whitish, sparse, of very unequal length, suberect 



