POLYEHACHIS. 391 



on the sides finely and delicately punctured ; the apices of the 

 thoracic and pedicel spines, and the legs and abdomen smooth and 

 highly polished ; pubescence and hairs entirely wanting. Pronotal 

 spines shorter than the inetanotal spines, pointing forward, 

 outward and curved slightly downward ; metanotal spines stout, 

 erect, their apical half curved outward and downward, resembling 

 chamois horns. Node of pedicel biconvex, with two moderately 

 long spines rising from the lateral angles above and pointing 

 backward, curved to the shape of the abdomen. 



Length, $ 8-9 mm. 



Hob. Upper Burma, the Euby Mines (BingJiam), and Shan 

 States, at 4UOO feet (Thompson) ;"Tenasserim, Karen Hills north 

 of Papun at 5000 feet (Bingham) ; Java. Nests in the joints of 

 bamboos. 



460. Polyrhachis tubericeps, Ford, Jour. Bomb. N. H. Soc. viii 

 (1893), pp. 26 & 33, $ . 



. Closely resembles P. simplex, Mayr, but can be readily 

 distinguished by the shape of the head. Dull black, head, 

 thorax and node of the pedicel somewhat coarsely and closely 

 punctured ; antennae, legs and abdomen opaque, finely granulate ; 

 the extreme apex of the thoracic and pedicel 

 spines smooth and shining, pubescence entirely 

 wanting. Head broadly oval, rounded pos- 

 teriorly, the tubercle behind the eyes on each 

 side very distinct ; clypeus convex, broadly but 

 not very distinctly longitudinally carinate, its 

 anterior margin nearly transverse, with two 

 minute median projections; thorax slightly 

 depressed ; pronotal spines short, pointing 

 forward and outward ; metanotal spines erect, 

 Pofi/hachis slightly curved outward at their extreme 

 tubericeps, g . points ; legs stout, tibiae without hairs or 

 spines. Node of pedicel thick, with a mode- 

 rately long, stout spine at its lateral angles, curved backwards and 

 embracing the abdomen, and with two vertical acute short teeth 

 between them ; abdomen only slightly convex above. 

 Length, 7-8 mm. 



Hab. Bengal, Barrackpore ; North-West Provinces (Rothney). 

 But for the tuberculate head this species is almost identical 

 with some of the larger varieties of P. simplex, Mayr. 



461. Polyrhachis thompsoni, sp. nov. 



Black, opaque ; head and thorax moderately coarsely, abdomen 

 very finely rugulosely granulate ; pilosity and pubescence entiivly 

 waiiting, with the exception of a very few erect yellowish hairs at 

 the apex of the abdomen. Head nearly oval, a little broader 

 posteriorly than in front; clypeus convex, its anterior margin 

 slightly advanced in the middle, with the apex medially sub- 



