or MYSOL, CERAM, WAIQIOU, BOUEU, AND TIMOll. 15 



verrucatis ; thorace spinis iluabus minutis antice armato ; abdominis 

 squamula supra bispinosa ; pedibus ferrugineis. 



Worker. Length 3 lines. Black; head and thorax minutely and finely 

 rugose ; the head very prominent in front ; the mandibles and antenna? 

 ferruginous, the scape more or less fuscous above. Thorax above and 

 at the sides flat, the anterior angles with a short acute tooth ; the 

 legs ferruginous, the anterior coxte black. The abdomen globular, 

 smooth, and shining, with the base castaneous ; the node of the pedun- 

 cle armed with two long, acute, curved spines, which incline slightly 

 towards the abdomen. 



Hab, Waigiou. 



20. PoLYRHACHis BuBASTES. P. uigcr, capite rugoso; thorace spi- 

 nis duabus acutis antice et postice armato ; squama bispinosa ; pedi- 

 bus obscure ferrugineis. 



Female. Length 5\ lines. Black, thinly sprinkled with erect hairs; the 

 abdomen covered with ashy, silky pubescence ; the legs dark ferrugi- 

 nous. The head very coarsely rugose, much narrowed behind the eyes, 

 with the posterior lateral angles produced and forming curved flattened 

 processes or spines. The thorax elongate, widest in the middle, 

 rugose, but much more finely so than the head ; the spines in front 

 short, curved, stout, and acute; the posterior pair are of the same 

 form ; the legs obscurely ferruginous ; the scale of the abdomen in- 

 crassate, rugose, and armed with two short acute spines behind. 

 Worker. This sex only dift^ers in the form of the thorax, which is oblong, 

 the sides straight and gradually narrowed slightly posteriorly; the 

 sculpture on the thorax stronger than in the female. 

 Hab. Waigiou. 



This species closely resembles the P. sescspinosus, but diff'ers too much 

 to be regarded as a variety of that species ; the form of the head is 

 very different, being more narrowed behind the eyes, the sides being 

 straight ; the short, thick, curved spines on the thorax also distinguish it 

 from P. sexpinosus. 



21. PoLYRHACHis PAROMALUS. P. niger, Isevis nitidusque, thorace 

 spinis duabus acutis postice armato ; pedibus obscure ferrugineis ; 

 squama spinis duabus acutis curvatis. 



Worker. Length 3 lines. Jet-black, smooth and shining ; the man- 

 dibles ferruginous ; the extreme base and apex of the antennae rufo- 

 piceous ; the head much narrowed behind the eyes, which are round 

 and prominent ; the front of the head very convex. Thorax : on each 

 side in front a minute tooth or tubercle ; armed posteriorly with two 

 long, bent, acute spines, directed backwards ; the metathorax oblique ; 

 the legs long and obscurely ferruginous. Abdomen : the node of the 

 peduncle with two long, bent, acute spines directed backwards above 

 the base of the abdomen ; the latter smooth, shining, and globose. 



Hab. Ceram. 



