COLLECTED IN BORNEO, ETC. 73 



})ubescence, the nodes of the abdomen dark rufo-pieeous, 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-testaceous j 

 antennse slender and 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 tibiae, and the tarsi, pale ferruginous. Abdomen smooth 

 and shining, the apex pale ferruginous. 



Hah. Borneo (Sarawak). 



2. Heptacondylus subcarinatus. H. capite thoraceque ferru- 

 gineis ; abdomine rufo-fusco ; capite thoraceque carinulis irregularibus 

 abbreviatis; metathorace spinis duabus acutis armato. 



Worker. Length 2\ lines. Head, antennae, 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 carinae 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. 



Hob. Borneo (Sarawak). 



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

 thoraceque carinis irregularibus abbreviatis; metathorace spinis duabus 

 longis armato. 



Worker. Length 2i lines. Dark fusco-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 Foneridce, 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. PROC. ZOOLOOT. 6 



