POLYRHACHIS. 407 



head and the apical and under surfaces of. the abdomen, and a 

 very thin, more or less indistinct, recumbent yellow silky pile 

 chiefly visible on the abdomen. Head rounder and shorter than 

 in P. striata, Mayr, the cheeks and front very convex ; clypeus 

 convex, its anterior margin arched, not emarginate ; the front of 

 the head finely longitudinally striate. Thorax short, broad in 

 front, compressed posteriorly, longitudinally striate ; pro-meso- 

 notal suture well-marked, laterally incised ; meso-metanotal 

 suture obsolete above, but the thorax incised laterally at the 

 place ; pronotal spines strong, acute, diverging outwards ; basal 

 portion of metanotum posteriorly transversely margined and with 

 an erect short tooth at the posterior lateral angles ; apical portion 

 concave, smooth, shining, the striae almost effaced ; legs mode- 

 rately long, opaque, without spines or hairs, the tibiae cylindrical. 

 Node of pedicel high, biconvex, striate, narrower proportionately 

 than in P. striata and P. Jiamulata, surmounted at the lateral 

 angles by two long erect spines, the space between which is 

 concave ; the sides of the node with a laterally pointing short 

 acute spine, placed lower on the side of the node than in any of 

 the preceding species ; abdomen globose. 



Length, $ 8-9 mm. 



Hab, Ceylon (Yerbury). 



488. Polyrhachis striatorugosa, Mayr, Verh. zool.-bot. Ges. Wien, 

 xii (1862), p. 086, $ , pi. 19, % 9 ; Forel, Jour. Bomb. N. H. 

 Soc. viii (1893), p. 19, $. 



" $ . Length 10 mm. Black, opaque, apex of the flagellum 

 and claws reddish yellow, middle of the front tibiae brown. 

 An erect fox-red pubescence, somewhat plentiful on the whole 

 body. A recumbent yellowish pile sparsely covering the head 

 and abdomen. Mandibles finely and closely longitudinally striate, 

 with scattered punctures. Clypeus feebly carinate, finely rugose ; 

 anterior margin rounded. The remainder of the head rather 

 coarsely strigately rugose. Thorax as in the preceding two 

 species rugose, longitudinally striate. Pronotum with two broad- 

 based spines pointing forwards and outwards. The lateral angles 

 of the basal portion of the metanotum toothed, the teeth short, 

 vertical. Pedicel with a thick six-sided node surmounted by two 

 rather short erect slightly divergent spines ; the margin of the 

 node between the two spines nearly straight, only with a median 

 tubercle, the sides of the node bear a lateral and somewhat upward 

 pointing spine, a little shorter than the upper two spines ; node 

 of pedicel rugose. The abdomen closely, distinctly longitudinally 

 striate and rugose. Legs finely shagreened." (Mayr.) 



Hab. Burma ; Java (Mayr}. 



This species, unknown to me, seems very close to P. hamulata, 

 Eirery, distinguished chiefly by the shorter upper nodal spines. 



