ATOPOMYUMEX. ACANTHOMYBMEX. 191 



somewhat superficially longitudinally striate ; the pronotum trans- 

 versely striate in front, longitudinally on the sides ; the apical 

 portion of the metanotum and the whole of the abdomen except 

 the base smooth, polished and shining ; pilosity pale, moderately 

 abundant, very short and obtuse, entirely absent on the antennae 

 and legs, which have only a thin, fine, pale pubescence, visible only 

 in certain lights. Head rectangular, posteriorly transverse and as 

 brpad as iri front ; mandibles triangular, striate, the masticatory 

 margin dentate; clypeus convex in the middle, anteriorly rounded ; 

 antennal carina3 elongate, reaching up to the level of the eyes ; 

 antennae short and thick, the scape not extending to the top of 

 the head, the club of the flagellum tolerably distinct, formed of the 

 apical three joints ; no antennal groove, but the front of the head 

 slightly concave or flat, where the antennae rest when folded ; eyes 

 round, placed on the sides of the head below the middle ; ocelli 

 distinct, a slight short broad groove on the front beneath the anterior 

 ocellus. Thorax elongate, narrow, narrower than the head, the 

 pronotum rounded in front, forming a very little part of the dorsum ; 

 mesonotum slightly convex, crossed posteriorly lay atrans verse carina; 

 metathorax cubical, its disc above, level, with a strong triangular 

 short spine at the posterior lateral angles, the spines parallel and 

 pointing backwards, from the base of these spines two parallel 

 carinae margin the apical face laterally and end in a broad laminate 

 >tooth on each side below ; legs moderatelv long and stout, the 

 tibiae destitute of calcaria, claws simple. Pedicel elongate ; 1st node 

 cubical, longer than broad, convex above, petiolate anteriorly, 

 without spines or teeth ; 2nd node quadrate, convex above, slightly 

 broader than long; abdomen oval. Wings hyaline, nervures 

 brownish yellow ; fore wing with one cubital and one disooidal 

 cell. 



Length, 8-10 mm. 



Hob. Calcutta (Brit. Mas. $ Rothney) ; Ceylon (Horn) : Upper 

 Burma, Euby Mines (Bingham). 



In all three cases these were females. The is unknown. 



Genus ACANTHOMYRMEX. 



Pheidole, pt., Smith, Jour. Linn. Soc. v (1861), p. Ill, pi. i, figs. 3 & 



4, li- 

 Acanthomvnnex, Emery, Ann. Soc. Ent. Ft: xlii (1893), p. 244 



I/ , pL 0, figs. 5-10, l/. 



Type, A. Inciolce, Emery, from Ceylon. 



Range. Indo-Malayan region. 



. Mandibles triangular, very broad at the masticatory margin, 

 this margin and the outer margin subequal, the former denticulate ; 

 clypeus convex, produced upwards between the base of the antenna; 

 antennal carinae short but produced backwards as low, not promi- 

 nent carina), bordering the antenual hollow, which reaches a little 

 beyond the level of the eyes, but is not close to the latter; 



