214 FORMICIDiE. 



clypeus medially, and the scape of the aiiteiinte siuoolh and shining. 

 Tliorax, nodes of the ])edicel and ahdomen smootli, shining, with 

 a very few scattered ])unctures, most plentii'id on the nodes of the 

 pedicel above. For the rest the characters of the genus. 



Length ., ^ 3'75-4 mm. 



Hah. Tenasserim (Fea), extending to the Malayan subregion. 



Genus TRICHOMYRMEX. 



Tricliomyrmex, Mai/r, Novara lifise, lunnicid. 1865, p. 19. 



Type, T. rogeri, Mayr, from Ceylon. 



Range. Known only from Ceylon. 



" 5 . Mandibles triangular, moderately narrow, dentate ; antennae 

 without a distinct club ; frontal area indistinct and remarkably 

 narrow ; frontal furrow slight, vertex with a medial fovea ; thorax 

 unarmed, metanotum rounded ; 1st joint of the pedicel anteriorly 

 triangularly petiolate, posteriorly with a transverse node, 2nd joint 

 globose, unarmed ; abdomen a long oval ; front wing with one 

 cubital and one discoidal cell, the cubital nervure joined to the 

 transverse ner^•ure at the commencfnnent of the bifurcation, radial 

 cell open ; calcaria simple, minute." {Mayr.) 



248. Trichomyrmex rogeri, Mai/r, Koi-am Reise, Fonmcid. I860, 

 p. 19, footnote. 



" 5 . Length 11 mm. Brown, head and part of the thorax 

 reddish, abdomen fuscous, flagellum and tarsi testaceous red ; with 

 adpressed pilosity, shining, head not densely punctured; mandibles, 

 cheeks and front longitudinally and the vertex transversely striate; 

 clypeus smooth in the middle ; thorax partly smooth, partly with 

 scattered punctures, sides of the thorax posteriorly striate, pedicel 

 finely and lightly rugulose ; abdomen (almost smooth) finely 

 coriaceoits-rugulose, 1st segment smooth; the legs with nume- 

 rous somew hat erect hairs : wings subhyaline." 



Mab. Ceylon {Mayr). Unknown to me. 



Genus LEPTOTHORAX. 



Formica, pt., Fahr. Si/st. Ent. 1775, p. 393. 



Myrmica, pt., Latr. Hist. Nat. Crust. Ins. xiii, 1805, p. 259 ; Smith, 



'Cat. vi, 1858, p. 119. 

 Leptothorax, Mayr, Verh. zool.-bot. Ges. Wien, v (1855), p. 431. 



Type, L. acervorum, Fabr., from Europe. 



Range. Both hemispheres. 



$ . Head more or less bi'oadly oval (in the Indian species) ; 

 mandibles moderately broad, masticatory margin with 4 or 5 

 teeth ; clypeus triangular, more or less convex, its anterior margin 

 transverse ; frontal area triangular ; antennal carina? short and 

 nearly straight; antenna? short, 12-jointed, the club of the 

 flagellum formed of the apical 3 joints, \Ahich united are about as 



