214 FORMICID.S. 



clypeus medially, and the scape of the antennae smooth and shining. 

 Thorax, nodes of the pedicel and abdomen smooth, shining, with 

 a very few scattered punctures, most plentiful on the nodes of the 

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



Length, $ 3'75-4 ram. 



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



Genus TRICHOMYRMEX. 



Trichomyrmex, Mayr, Novara Reise, Formidd. 1865, p. 19. 



Type, T. rogeri, Mayr, from Ceylon. 



Range. Known only from Ceylon. 



" $ . 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 nervure at the commencement of the bifurcation, radial 

 cell open ; calcaria simple, minute." (Mayr.} 



248. Trichomyrmex rogeri, Mayr, Novara Reise, Formicid. 1865, 

 p. 19, footnote. 



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

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

 ad pressed 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 

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

 rous somewhat erect hairs ; wings subhyaline/' 



Hob. Ceylon (Mayr). Unknown to me. 



Genus LEPTOTHORAX. 



Formica, pt., Fabr. Syst. Ent. 1775, p. 393. 



Myrmica, pt., Lair. 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 broadly 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; antennas short, 12-jointed, the club of the 

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



