will I I.IK : TIIK ANTS iiF HOKNKO. I'i.'j 



till* first Ki>gin<Mi1 forinitiK alMHit J nf its Mirfacc, truiic'itcd in frunl. I/'^n 

 iiKHlorntrly loiijj; tilti.-u' cyliiulriciil, const rictcd at tin- Ihimc, witlmiit hriKtlt-s 

 on tlu'ir Hcxor surfacrs. 



(SiLstcr and ^ula snuMtth iitui hliininfi; n-niaindt-r of Ixxly and the iip|M-n<laK<*H 

 sul><>im(ji»v Mandililo8 vrry fiiu'ly Ktriat<'d and sparsely jmnctatr; licad, 

 tlioriix, and iH'tioh* d«'nsoly punctati'-ninulosc, tin- nij^uli's r<»arscr ami rrtini- 

 lato on the dorsal surfaif of the head; the spinew of the epinotutn and iX!tiole 

 very finely shapreoneil, like the antennal 8ra|K*s uiul lej{s. 



Hairs whitish, erect; present only on the vent4'r, tip of K!w<t*''"i clypoal 

 luirdcr, and nmndihles. I'ulM-scence pale, very fine and dilut<', visible only 

 on the tihiae, antennal funiculi, and sid«'s of the Kast«'r. 



Hlack; i)alpi and sjnirs of the tihiae retl. 



Described from a single specimen taken hy Mr. (I. K. Hryant on 

 Mt. Matanj;. West Sarawak and sent nie 1)\' Mr. Horace 1 )onistlioq)e. 



This species helonj^'s to the dircs group but is very distinct in the 

 shap>e of the head, thorax, and petiole. 



*229. PoLYRHACHis (Mvrmhopla) atrovirens Emery. 



Polyrhachis atronrens Emery, Ann. Mus. civ. Geneva, UKK), .>^er. 2, 20, j). 7 IS, 

 8 , fig. Ifia. 



Typc-localiiij: Hua Hiia, Engana (E. Modigliani). 



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



*230. Polyril\chis (Myrmhopl.\) oedacantha, sp. nov. 

 Worker. Length 4 mm. 



Related to P. hippomnnes Smith and atronretis Emery. Head elliptical, 

 longer than broad, semicircularly rounded behind with feebly convex side.s 

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

 their anterior orbits at the median tran.svense diameter of the head. Mandibles 

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

 Cl>-peus carinate at the ba.'^e, 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, .\ntennae long and slender, their scapes extending fully ^ their 

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

 trapezoidal, broadest through the humeri, evenly, longitudinally, and tran.s- 

 versely rounded and convex above, with distinct promcsonotal and mcso- 

 epinotal sutures. Pronotum about H 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 



