Key to the Species. 



2 $. 



a. I^ength over o iiiru. Colour more or less 



brown. 

 a . Chpeus not carinato. 



d^. Anterior border of clypeus emarginjite 



in tbe middle " O. ra/'u, p. J ol. 



h-. Anterior border of clypeus not emar- 



ginate O. leei, p. loo. 



b'. Clypeus feebly but distinctly bicarinate. . O. heiH/al&n^iii, p. 154. 



b. Length under o mm. Colour more or Ics.s 



yellow 



a'.' Second node of pedicel transverse, much 



broader than long O. asimis, p. 150. 



/>'. Second node of pedicel not broader than 



long O. rothneyi, p. 1 56. 



179. Oligomyrmex raja, Forel, Bcv. Suisse Zool. x (1902), p. 216, $ . 



2 . Very dark brown, almost black, the mandibles, antennae, 

 legs and abdomen che.stnut ; head, thorax and abdomen shining, 

 the head very finely and snperficially longitudinally striate, 

 posteriorly punctured, thorax and abdomen smooth ; nodes of tbe 

 pedicel rugulose, opaque ; pilosity sparse and scattered. Head 

 without mandibles nearly rectangular, tbe sides convex, posteriorly 

 truncate ; mandibles somewhat large, finely but rather obscurely 

 longitudinally striate, armed with 6 or 7 teeth ; clypeus not 

 carinate, deeply emarginate in the middle anteriorly; antennae 

 short, the club of tbe flagellum rather slender, joints 3-5 as 

 broad as long, scape vex-y short ; eyes large, placed about the 

 middle of the sides of tbe bead ; ocelli not very prominent. Thorax 

 moderately long, the mesouotum broad ; metanotum convex, sub- 

 vertical, without any distinct basal portion. Pedicel: the 1st 

 node petiolate anteriorly, transverse, rounded above, much broader 

 than long ; 2nd node a little longer than the 1st and a little 

 broader than long ; abdomen massive, i-ouuded at apex, AV'ings 

 flavo-byahne. 



Length, $ 5-o*5 mm. 



Hah. Eecorded from tbe Xorth AVestern Provinces, India 

 (Smi/tJiics) ; and from Bhamu, Upper Burma (Biw/ham). Only 

 the § is known. 



180. Oligomyrmex bengalensis, Forel, Her. Suisse Zool. x ^902), 



p. 217. 



" $ . Mandibles smooth and shining, a little punctured, armed 

 with 6 teeth. Head shortly rectangidai', barely longer than broad, 

 feebly emarginate posteriorly, without a carina behind the ocelli, 

 but feebly subtruncate at the occiput and anteriorly on the 

 clypeus, thi! posterior portion of tbe latter with a groove down 

 the middle forms an obtuse angle with the antei'ior subtruncate 

 portion. This latter is feebly bicarinate, impressed in the middle. 



