64 



thorax, ahove, slightly concave, and shaped like a horse-shoe; the 

 metathorax is also slightly concave, with the posterior angles acute 

 and elevated ; the metathorax smooth and shining behind ; the legs 

 rufo-testaceous. Abdomen: smooth, shining and subglobose ; the 

 scale elevated, with two short teeth above, the sides oblique ; the scale 

 narrowing to its base. 

 Hab. Sarawak. 



19. PoLYRHACHis DIVES. P. nigcr, aureo-sericeo vestitus; thorace 

 spinis acutis antice et postice armatis ; squama quadrata spinis duabus 

 longis curvatis. 



Worker. Length 2^ lines. Black : clothed with pale golden pubescence ; 

 the thorax with two short curved spines in front, and two of about 

 the same length at its posterior margin ; the scale of the abdomen 

 compressed, square in front, and having two long spines which curve 

 backwards ; the pubescence on the head and thorax with an obscure 

 gulden tinge; the legs without spines or pubescence; the calcaria 

 pale testaceous. 



Hab, Singapore. 



20. PoLYRHACHis viNDEX. P. nigCF, subnitidus ; thorace supra de- 

 planato, spinis duabus anterioribus ; squama integra ; pedibus ferru- 

 gineis ; tibiis et femoribus apice tarsisque fuscis. 



Worker. Length 2^ lines. Black : the head and thorax with a shining 

 hoary pile ; the head longitudinally striated ; the apex of the flagellum 

 beneath, and the palpi, pale rufo-testaceous. Thorax flattened above, 

 deUcately striated longitudinally ; the divisions of the thorax distinctly 

 marked by two transverse sutures; the lateral margins raised and 

 acute ; the anterior angles produced into acute spines ; the tibise and 

 femora ferruginous, and more or less fuscous at their apex. The scale 

 of the peduncle incrassate, compressed to a sharp edge above, which 

 is rounded, and terminates in a minute tooth laterally. Abdomen 

 smooth, shining and subglobose. 



Hab. Borneo (Sarawak). 



Subfam. Poneeidje. 



Gen. ODONTOMACHrs, Latr. 



I. Odontomachus rixosus. O. rufo-fuscus, femoribus pallide tes- 

 taceis ; margine interna mandibulorum subserrata, thorace transversim 

 striate. 



Worker. Length 4i lines. Reddish-brown : the coxae, trochanters and 

 femora pale testaceous, the extreme base, and apex of the latter, 

 darker ; the mandibles with two blunt teeth at their apex, the outer 

 tooth notched on one side, forming a second tooth ; the inner edge 

 slightly serrated, having only four or five minute teeth; the pro- 

 minence between the sulcations on the anterior part of the head. 



