478 bulletin: museum of comparative zoology. 



separated from the declivity. Petiole thick wedge-shape, posterior surface 

 convex, anterior surface convex and sloping, top narrowed and rounded; seen 

 from the front, straight above at middle and obliquely truncate at sides. 

 Gaster elongate. Legs compressed. 



Head strongly, the rest moderately shining. Mandibles coarsely punctate 

 and rugulose-striate. Head and thorax very finely coriaceous; front with a 

 few coarse, scattered punctures. Gaster transversely coriaceous-rugulose and 

 with scattered punctures. 



Sparse, erect black hairs on head and body and very short minute and sparse 

 recumbent hairs on head, body, and appendages. 



Rufocastaneous, with the head, basal bands on first and second gastric 

 segments, lateral blotches on the second, and the tip of gaster black. Ap- 

 pendages rufous. 



Worker. Length 5.5-6.5 mm. 



Head a little longer than broad, slightly narrowest in front, sides slightly 

 convex, posterior border broadly rounded. Clj'peus moderately convex at 

 anterior border. Antennal scapes surpassing occipital border by about 

 three eighths of their length. Pronotum but little longer than broad. Meso- 

 epinotimi compressed and cristate above, projecting behind as a triangular 

 tooth. Node cuneiform, convex in front, margined above and at sides. Gaster 

 elongate. 



Moderately shining, coriaceous-rugulose. Mandibles punctate and rather 

 strongly rugose-striate. 



Erect yellowish hairs sparse on head and thorax, abundant on gaster. Fine 

 and short appressed pubescence sparsely distributed on head, body, and 

 appendages. 



Head and gaster black, the rest rufocastaneous, mandibles, antennae, and 

 tibiae darker. 



Female. Length 10 mm. 



Head smaller, but otherwise similar to that of soldier. Epinotum with a 

 short convex base that rounds broadly into the dechvity. Petiole not strongly 

 narrowed above, from above less than twice as broad as long, narrowly rounded 

 at sides. 



Sculpture and pilosity as in soldier. Head and gaster black, the rest rufo- 

 castaneous, darker than soldier. 



Wings (length 9.75 mm.) clear, with brown veins. 



Male. Length 6.5 mm. 



Head longer than broad, cheeks subparallel, posterior border broadly 

 rounded. Cl>T)eus convex, its posterior border rounded. Mandibles with 

 concave and bluntly denticulate blades. Scapes surpassing occipital borders 

 by less than half their length. 



