142 SMITH ON HYMENOPTEEA OF ARU ISLANDS. 



12. PoLYRHACHis BELLicosus. P. capite abdomineque nigris, 

 thorace femoribusque rufis, thorace quadrispinoso, petioli squamula 

 biharaata. 



Worker. Length 3^ lines. Black, with the scale of the petiole, thorax, 

 coxae, and femora blood-red. Thorax : the lateral margins raised 

 above, with two slightly curved divergent spines in front, and two 

 stout, acute, long curved spines in the middle, directed backwards ; 

 the scale of the petiole forming a long erect pedestal, which termi- 

 nates above in two much bent acute hooks, directed backwards, 

 and being as high as the basal segment of the abdomen ; the spines 

 and hooks black at the apex. Abdomen ovate. 



Hab. Aru. 



13. PoLYRHACHis Hector. P. niger et vestitus pube palHde aurea ; 

 prothorace petiolique squamula bispinosis, pedibus ferrugineis. 



Worker. Length 3 lines. Black ; the apex of the scape and the legs 

 ferruginous j the extreme base of the tibiae and the tarsi black ; a 

 stout acute spine on each side of the prothorax, directed forwards; 

 the thorax flattened above, its lateral margins raised ; the divisions of 

 the segments very distinctly impressed ; the pale golden pubescence 

 on the abdomen thinner than on the head and thorax. The scale of 

 the petiole angled at the sides towards its summit, the angles dentate, 

 the upper margin straight, and at each lateral angle an acute spine, 

 directed backwards, and curved to the shape pf the abdomen; the 

 spines parallel. 



Hab. Aru. 



14. PoLYRHACHis RUFOFEMORATUS. P. nigcr, laevis, nitidus; fe- 

 moribus abdominisque squamula ferrugineis. 



Worker. Length 3^ lines. Black ; head oblong ; the eyes placed 

 high at the sides near the vertex, the front very prominent, with two 

 elevated carinae in the middle, at the outside of which the antennae are 

 inserted. Thorax : the divisions strongly marked, flattened above 

 with the sides elevated ; the prothorax with an acute spine on each 

 side anteriorly ; the coxae and femora ferruginous, with the apex of 

 the latter more or less fuscous. Abdomen : the base and the scale 

 ferruginous, the latter angled at the sides and emarginate above. 



Hab. Aru. 



Gen. PoNEEA, Latr. 



1. Ponera rugosa. Smith, Cat. Hym. Ins. Proc. Linn. Soc. ii. 66. 5. 

 Hab. Aru. Borneo. 



2. PoNERA scuLPTURATA. P. nitida nigra ; capite, thorace abdomi- 

 nisque segmentis primo et secundo profunde striatis, nodo spinis 

 duabus acutis armato ; pedibus abdomineque apice ferrugineis. 



Worker. Length 5 lines. Black and shiny, the legs obscurely ferru- 



