ECTOMOMYRMEX. 87 



chestnut-red. Pilosity and pubescence as in E. sundaicus, but a 

 little more dense. Head shorter and broader proportionately but 

 similarly sculptured. Thorax with the pronotum rather strongly 

 concave and transversely striate; the rest of the thorax longi- 

 tudinally striate, except the posterior sloping face of the metanotum 

 which is shaped as in E. sundaicus, but is transversely not longi- 

 tudinally striate ; legs with the femora and tibiae cylindrical. Node 

 of the pedicel posteriorly shining along the margins, transversely 

 s*triate in the middle ; abdomen but for the pubescence highly 

 polished, smooth and shining. 



5 . Similar, larger, with a more massive thorax and abdomen ; 

 the mesonotum and scutellum broad and somewhat flat ; the pro- 

 and mesonotum and scutellum longitudinally striate, the metanotum 

 somewhat more coarsely and concentrically striate. 



Length, % 9-11 ; $ 13 mm. 



Hcib. Assam (Long) ; Burma (Allan) ; Tenasserim (Bingham) ; 

 China, extending to the Malayan subregiou. 



106. Ectomomyrmex maternus, Ford, Jour. Bomb. N. H. Soc. xiii 



(1900), pp. 321 322, $. 



. Closely resembles E. javanus, but is slightly smaller and 

 more slender ; the pronotum is not nearly so convex, and has the 

 striae concentric and not transverse. Black ; the mandibles, 

 antennae, and legs reddish brown, of a lighter colour than in 

 E. javanus. 



Length, $ 8*5-9 mm. 



Hob. Assam (SmytJties) ; Burma, Maymyo, 3000 ft. (Bingham). 



Dr. Forel considers this as merely a local race of E. javanus, 

 Mayr. It is very closely allied, but the depressed pronotum with 

 the different sculpture and the coarsely dentate mandibles, as 

 indicated in the key, seem to be constant characters. 



107. Ectomomyrmex annamitus, Andre (Ponera), Rev. d'Ent. xi 



(1892), p. 48; Forel, Jour. Bomb. N. H. Soc. xiii (1900), pp. 321 

 &322. 



. Black ; the mandibles, antennae, femora, tibiae and tarsi 

 of the legs and apex of the abdomen castaneous red. Head, 

 thorax and abdomen with fairly abundant erect pale red hairs, 

 covered by a minute sericeous pubescence, only visible in certain 

 lights and in no way obscuring the sculpture. Head propor- 

 tionately more elongate than in E. javanus, posteriorly less 

 deeply emarginate, very densely and somewhat coarsely reticulate- 

 punctate, the occiput smooth and shining ; mandibles longer, with 

 the masticatory region not so broad, armed with 7 teeth. Thorax 

 nearly as broad anteriorly as the head, densely and somewhat 

 more finely reticulate-punctate, coarsely rugose towards the apex 

 of the basal portion of the metanotum ; legs proportionately 

 shorter, somewhat stouter. Node of the pedicel very thick, 

 coarsely rugose above, and with coarse concentric striae on its 



