172 FORMICIDJE. 



Key to the Species. . 



a. Antennae 12-jointed. 



a. First node of pedicel distinctly transverse, 



much broader than long. 



a '. Head much nan-owed anteriorly ; petiole 

 of 1st node of pedicel nearly as long as 

 node T. walsht, p. 172. 



V. Head nearly square, not narrowed ante- 

 riorly; petiole of 1st node of pedicel 

 short, barely half the length of node T. musculus, p. 173. 



b. First node of pedicel as long as, or distinctly 



longer than broad, not transverse. 



o'. Mandibles finely longitudinally striate . . T. striatidens, p. 173. 

 b'. Mandibles smooth or slightly punctured, 



not striate. 



2 . Second node of pedicel closely punc- 

 tured, opaque T. obesa, p. 173. 



b 2 . Second node of pedicel smooth and 



shining, not punctured nor opaque . . T. orissana, p. 1 74. 



b. Antennae IQ-jointed T. decamera, p. 174. 



196. Triglyphothrix walshi, Forel,Ann. Soc. Ent. Beige, xxxiv (1890), 

 C. R. p. cvii, $ . 



. Dull brown, abdomen darker, almost black ; mandibles, an- 

 tennae and legs dull brownish yellow; head, thorax, pedicel and 

 basal half of abdomen very finely and closely longitudinally punc- 

 tured and reticulate, opaque, in certain lights appearing striate ; 

 pilosity very dense and woolly, whitish in colour, and somewhat 

 concealing the sculpture. Head trapeziform, broader posteriorly 

 than in front, slightly emarginate posteriorly ; mandibles punctured, 

 with a few coarse striae ; frontal area and medial longitudinal 

 groove on the front absent ; antennae short, the scape not reach- 

 ing the top of the head ; antennal grooves broad and shallow, 

 slightly shining ; eyes placed in the middle of the sides of the 

 head and a little to the front. Thorax short and broad, shorter 

 than the head, curved and convex above ; the metanotal spines 

 subtriangular and acute at apex, pointing obliquely back ; apical 

 portion of metanotum shining, laterally carinate. Pedicel : 

 the nodes transverse, much longer than broad, the 1st node 

 petiolate anteriorly, the petiole nearly the length of the node; 

 abdomen oval. 



" $ . Basal area of metanotum nearly vertical, shining, longitu- 

 dinally rugose. Mesonotum rugose, longitudinally reticulate. 

 Striate portion of the abdomen shorter than in the $ ; the 

 remainder of the abdomen is covered with fine sparse piligerous 

 punctures, more distinct than in the $ . Thorax short, a little 

 narrower than the head. Abdomen small. Wings almost hyaline, 

 faintly tinged with yellow, finely pubescent. Nervures and stigma 

 pale. For the rest, identical with the ." (Forel.) 



