400 FOBMICIDJE. 



not concave; rnetanotum shorter, the spines thicker at base and 

 shorter. Pedicel shorter, but similar to the pedicel in P. mutata, 

 but the spines are very much shorter, most noticeably so, and 

 instead of passing round curved to the shape of the top of the 

 abdomen, they embrace the abdomen somewhere about halfway up 

 the anterior face of the 1st segment. Tibiae of the legs not quite 

 so compressed as in P. mutata. Smith, and entirely without spines 

 on the inner margin. 



Length, $ 5-5 mm. 



ffab. Burma : Pegu Yoma (Singham). 



470. Polyrhachis levigata, Smith, Jour. Linn. Soc. ii (1857), p. 62,$; 

 Forel, Jour. Bomb. K. H. Soc. viii (1894), p. 400, . 



. Black, the coxse, base of the femora and abdomen red, apical 

 half of the flagellum brownish red : head and abdomen smooth 

 and shining, polished ; thorax delicately punctured, subopaque. 

 Thorax cylindrical, very convex above ; pronotum transverse in 

 front, without spines, but the lateral angles acute, subdentate ; 

 metanotum with the basal portion concave from right to left, the 

 spines slender, acute, slightly divergent and sloped backward; 

 legs rather long and stout, tibiae smooth, without spines or hairs. 

 Node of pedicel biconvex, with two proportionately stout spines, 

 divergent and strongly curved backwards to the shape of the 

 abdomen ; abdomen globose. 



Length, 5*6 mm. 



Hob. Burma : Pegu Toma (Allan) ; Tenasseriin, Ye Valley 

 (Binrjham) : Malacca. 



A rare species. It is with some doubt that I follow Dr. Forel 

 in uniting the above described ant with P. levigata, Smith. Smith 

 says nothing of the abdomen being red, and states that P. levigata 

 has the flagellum of the antennae clavate, which the species from 

 Burma and Tenasserim has not. 



477. PolyrhacMs ceylonensis, Emery. 



Polyrachis hippomanes, Smith, race ceylonensis, Emery, apud Forel, 

 Jour. liomb. N. H. Soc. viii (1893), p. 22. . 



$ . Black ; the flagellum of the antennae, and the femora, tibiae and 

 tarsi of the legs reddish yellow, the mandibles and scape of the 

 antennae fuscous red. Head and thorax finely, abdomen minutely, 

 reticulate-punctate and slightly shining ; pubescence almost en- 

 tirely wanting, a few scattered erect hairs occurring on the front 

 of the head and apex of the abdomen. Head oval, a little broader 

 posteriorly than in frout ; clypeus convex, with a median vertical 

 carina, the anterior margin arched ; antennal carinae slightly diver- 

 gent towards the vertex, moderately wide apart, w^ith an impressed 

 shoi-t vertical line between them. Thorax short and massive, con- 

 vex above, the pro- and mesonotum broader than long ; pronotum 

 armed with a short outward-pointing tooth on each side ; meta- 

 notum with two short erect stout spines at the posterior lateral 

 angles of the basal portion ; legs stout, tibiae cylindrical, without erect 



