wheeler: the ants of borneo. 135 



the first segment forming about f of its surface, truncated in front. Legs 

 moderately long; tibiae cylindrical, constricted at the base, without bristles 

 on their flexor surfaces. 



Gaster and gula smooth and shining; remainder of body and the appendages 

 subopaque. Mandibles very finely striated and sparsely punctate; head, 

 thorax, and petiole denselS' punctate-rugulose, the rugules coarser and reticu- 

 late on the dorsal surface of the head; the spines of the epinotum and petiole 

 very finely shagreened, like the antennal scapes and legs. 



Hairs whitish, erect; present only on the venter, tip of gaster, clypeal 

 border, and mandibles. Pubescence pale, very fine and dilute, visible only 

 on the tibiae, antennal funiculi, and sides of the gaster. 



Black; palpi and spurs of the tibiae red. 



Described from a single specimen taken by Mr. G. E. Bryant on 

 Mt. Matang, West Sarawak and sent me by Mr. Horace Donisthorpe. 



This species belongs to the dives group but is very distinct in the 

 shape of the head, thorax, and petiole. 



*229. PoLYRHACHis (Myrmhopla) atrovirens Emery. 



Pohjrhachis alrorirens Emery, Ann. Mus. civ. Geneva, 1900, ser. 2, 20, p. 718, 

 U , fig. 16a. 



Type-locality: Bua Bua, Engana (E. Modigliani). 



A single worker from Sadong, Sarawak (H. W. Smith). 



*230. PoLYRHACHis (Myrmhopla) oedacantha, sp. nov. 

 Worker. Length 4 mm. 



Related to P. Mppomanes Smith and atrovirens Emery. Head elliptical, 

 longer than broad, semicircularly rounded behind with feebly convex sides 

 and equally convex dorsal and gular surfaces. Eyes moderately convex, 

 their anterior orbits at the median transverse diameter of the head. Mandibles 

 with rather rounded external borders, the apical borders with 5 subequal teeth. 

 Clypeus carinate at the base, its anterior border broadly rounded and some- 

 what crenulate. Frontal area distinct, triangular. Frontal carinae approxi- 

 mated, sinuous, a little further apart behind than in front ;^ frontal groove 

 absent. Antennae long and slender, their scapes extending fully -g- their 

 length beyond the posterior border of the head. Thorax from above elongate 

 trapezoidal, broadest through the humeri, evenly, longitudinally, and trans- 

 versely rounded and convex above, with distinct prom?sonotal and meso- 

 epinotal sutures. Pronotum about U times as broad as long, its anterior 

 corners produced as flattened, triangular and slightly upturned teeth. Meso- 

 notum of the same length as the pronotum; epinotum very short, without 

 distinct base, but sloping abruptly from the mesoepinotal suture which lies 

 just in front of the spines. These are long, stout, and acute, as long as the 

 declivity, widely separated and curved at their bases, with slightly sinuous 



