POLYBHACHIS. 401 



hairs or spines, and slightly attenuated towards the base. Node of 

 pedicel somewhat flat in front, convex posteriori}', armed at the 

 upper lateral angles with two strong, rather wide-spreading spines, 

 that are curved backward ; abdomen globose. 



$ . Similar to the in colour ; head and thorax reticulate- 

 punctate, abdomen opaque ; head shorter and much wider poste- 

 riorly than in the ; clypeus narrower, only subcarinate ; pronotal 

 spines thicker, triangular in shape, metanotal spines shorter and 

 more horizontally directed backward ; mesonotum nearly flat 

 above, with an indistinct longitudinal sulcus down the middle and 

 a short impressed line on either side near the base of the wings. 

 Node of pedicel broad and flat, the spines shorter than in the g ; 

 the anterior portion of the abdomen with a deep overhanging margin, 

 the abdomen above slightlv convex, depressed. 



Length, 4-5 ; $ 6 mm. 



Hab. Ceylon (Green). 



The $ d'iffers more from the in this than in any other species 

 of Polyrhachis known to me. 



478. Polyrhachis wroughtoni, Forel, Jour. Bomb. N. II. Soc. viii 

 (1894), p. 398, g; ix (1894), p. 457, $ rf. 



. Black ; the autennse, the tibia) and tarsi of the anterior, and 

 the femora, tibiae and tarsi of the intermediate and posterior legs 

 ochraceous, more or less shaded with fuscous, the femora of the 

 anterior legs castaneous, the front of the abdomen reddish. Head, 

 thorax and node of pedicel somewhat coarsely punctured, cribrate ; 

 abdomen finely granulate, opaque ; with the exception of a few 

 short erect pale hairs on the head anteriorly and on the apex of 

 the abdomen beneath, pubescence entirely wanting; in certain 

 lights a very thin recumbent pilosity is visible on the head, the 

 sides of the thorax and abdomen. Head broader posteriorly than 

 in front ; clypeus very convex, with the anterior margin arched and 

 bearing two short divergent teeth in the middle ; autennal carinae 

 short, widely separated and slightly divergent posteriorly. Thorax 

 short, massive, pronotum much broader than long ; pro-mesonotal 

 suture distinct, meso-rnetanotal suture obsolete; pronotum with 

 the anterior margin transverse, undulate, the lateral angles armed 

 with a short acute downward-bent tooth, directed obliquely out- 

 wards ; metanotal spines acute, erect, very divergent ; apical portion 

 of metanotum flat, nearly concave; legs short, stout, the tibiae 

 smooth. Node of pedicel biconvex, broad, with two stout laterally 

 spreading spines, carved to the shape of the abdomen ; between 

 the'm the upper margin of the node is arched and bears two minute 

 erect teeth ; abdomen depressed, very slightly convex above. 



" $ . Mesonotum depressed, the pronotum armed with only two 

 small triangular teeth. The spines on the metanotum are shorter 

 than in the $ and directed more horizontally backward. Wings 

 brown, a pale spot before the stigma. For the rest similar to 

 the $. 



VOL. II. 2 



