156 FORMICIU.E. 



182. Oligomyrmex asinus, Forel, Rec. Suisse Zoo/. X (1902), p. 214. 



^ maj. lleddish yellow ; the legs, pedicel and abdomeu of a 

 paler shade ; head anteriorly obscurely longitudinally striate, 

 very sparsely punctured, the rest smooth, polished and shining ; 

 pilosity pale yellow, fairly plentiful. Head long, about twice 

 as long as broad, not very convex in front, the posterior lateral 

 angles prominent and each furnished with a remarkable spine on the 

 apex; betu een these spines, viewed from the front, the head appears 

 widely emarginate ; mandibles broad, smooth and shining, fur- 

 nished \\it\\ 5 teeth ; clypeus prominent in the middle, bicarinate. 



Fig. 63. — OUgoiiiijrjne.r asinus, ^ niaj. 



but not dentate ; antennae short, the scape barely reaching halfway 

 up the head ; eyes minute, placed very close to the anterior 

 margin of the head. Thorax : the pro-mesonotum remarkably 

 raised, convex, rounded at the sides ; the meso-metanotal suture 

 deeply impressed, the tliorax constricted and emarginate at the 

 suture ; metanotum Hat, suhmargined and subdentiform pos- 

 teriorly. Pedicel: 1st node broader than long, rounded anteriorly, 

 petiolate : 2nd node rounded, transverse , abdomen long and 

 massive. 



^ min. Kesembles the ^ 5»«./., but is paler in colour, entirely 

 devoid of eyes and of the remarkable horns on the posterior lateral 

 angles of the head. The pedicel is proportionately shorter, and 

 the abdomen small, not massive. 



2 . Resembles the ^ maj., but is totally devoid of the horns on 

 the posterior lateral angles of the head. Head short, only a little 

 longer than broad, transverse posteriorly, with a few transverse 

 striae between the ocelli ; a ])rominent stria or carina connecting 

 the posterior two ocelli. Thorax somewhat long and narrow, 

 narrower than in 0. raja ; the metanotum posteriorly with two 

 long rounded tubercles. Colour as in the ^ maj. 



Length, g maj. 2*5-4 ; ^ min. 1 : 5 4-5 mm. 



Huh. Bengal (Tai/lor). 



183. Oligomyrmex rothneyi, Fotrl, liev. Suisse Zoo!, x (1902), 

 p. 218, 2 . 



2 • lieddish yellow, the antenna? and legs paler yellow, the 

 abdomeu slightly brownish; head, thorax and abdomen shining ; 

 the head, between and over the base of the anteniur, finely longi- 

 tudinally striate, posteriorly together with the thorax and pedicel 

 minutely but verj' sparsely punctured ; abdomen smooth and 



