64 MR. smith's catalogue of hymenopterotts insects 



thorax, above, 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. 

 Hub. Sarawak. 



19. Polyrhachis dives. P. niger, aureo-sericeo vestitus ; thorace 

 spinis acutis antice et postice armatis ; squama quadrata spinis duabus 

 longis curvatis. 



Worker. Length 2i 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 

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

 pale testaceous. 



Hab. Singapore. 



20. Polyrhachis vindex. P. niger, 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, 

 delicately 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 tibiaj 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. Poneridje. 

 Gen. Odontomachus, Latr. 



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

 taceis ; margine interna mandibulorum subserrata, thorace transversim 

 striato. 



Worker. Length 4% lines. Reddish-brown : the coxse, 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, 



