COLLECTED IN BORNEO, ETC. 73 



pubescence, the nodes of the abdomen dark rufo-piceous, globose, and 

 each having a distinct petiole ; the petioles pale rufo-testaceous. 



Worker. Length 2f lines. Dark rufo-fuscous : the antennae, head 

 beneath, mandibles and lower part of the face pale rufo-testaceons ; 

 antennae slender atid elongate; head smooth and shining, not carinated. 

 Thorax shining, the lateral margins traversed by a sharp carina ; the 

 metathorax elevated and armed with two acute spines; the legs 

 elongate and slender, the coxae beneath, the base and apex of the 

 femora and tibia;, and the tarsi, pale ferruginous. Abdomen smooth 

 and shining, the apex pale ferruginous. 



Hab. Borneo (Sarawak). 



2. Heptacondylus subcarinatus. H. capite thoraceque ferru- 

 gineis ; abdomine rnfo-fusco ; capite thoraceque carinulis irregularibns 

 abbreviatis; metathorace spinis duabus acutis armato. 



Worker. Length 2^ lines. Head, antenna;, thorax and legs, ferruginous, 

 sometimes pale ferruginous; abdomen fuscous, or rufo-fuscous, the 

 petiole of the basal node pale ; head shining, and having a num- 

 ber of irregular delicate carinas on the front and vertex ; in front of 

 the eyes are a number of irregular striae. Thorax : the sides com- 

 pressed, widest anteriorly ; the superior surface slightly convex, 

 and having a number of longitudinal abbreviated elevated carinae ; 

 the lateral margins traversed by a slight carina ; the metathorax with 

 two stout acute spines. Abdomen smooth and shining ; the insect 

 sprinkled with a number of pale erect hairs, most numerous on the 

 scape and legs. 



Hab. Borneo (Sarawak). 



3. Heptacondylus carinatus. H . obscure fusco-ferrugineus ; capite 

 thoraceque carinis irregularibus abbreviatis; metathorace spinis duabus 

 longis armato. 



Worker. Length 2h lines. Dark fnsco-ferruginous, closely resembling 

 H. subcarinatus, but with thicker antennae, and the joints shorter, the 

 scape distinctly shorter and not so slender at the base ; the head pro- 

 portionably larger and much more strongly carinated ; the thorax 

 roughly carinated, and having longer and stouter spines ; in other 

 respects agreeing with H. subcarinatus. 



Hab. Borneo (Sarawak). 



This may possibly be a form of H. subcarinatus, but the various differ- 

 ences pointed out appear to characterize a distinct species. 



The insect which I am about to describe, although evidently 

 belonging to the Ponericlce, is of such a different and remarkable 

 form, to any insect belonging to any of the sections of the genus 

 Ponera, or any of the subgenera, that I propose to constitute a 

 new genus for its reception ; the abdomen of this singular species 



LINN. PEOC. — ZOOLOGY. 6 



