400 FOEMIOID.'E. 



not concave; metanotum sliorter, 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. 



FIcih. Burma : Pegu Yoma (Bl)u/ham). 



47(5. Polyrhachis levigata. Smit/i, Jour. Linn. Soc. ii (1857). p. 62, g; 

 Fore/. Join: Bowh. N. H. Soc. viii (1894), p. 400, g . 



2 . 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 backwai'ds to the shape of the 

 abdomen ; abdomen globose. 



Length, ^ 5"6 mm. 



Jfab. Burma : Pegu Yoma (Allan) ; Tenasserim, Te Valley 

 (Bingham) ; Malacca. 



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

 in uniting the above described ant with P. levigata, 8miih.. Smith 

 says nothino- 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. Polyrhachis ceylonensis, Emery. 



Polvrachis hippomaues. Smitli, race ceylonensis, Emery, ajmcl Forel, 

 Jonr. Bomb. N. H. Soc. viii (1893), p. '22, ^ . 



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

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

 antennae fuscous red. Plead 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 front ; clypeus convex, with a median vertical 

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

 gent to\\ards the vertex, moderately wide apart, with an impressed 

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

 vex aboA'e, 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, tibise cylindrical, without erect 



