COLLECTED IN BORNEO, ETC. 67 



grooved. Thorax oblong, widest in front, the anterior margin 

 curved, the lateral angles acute ; the metathorax truncate ; the pro- 

 thorax with large deep confluent punctures ; the mesothorax longitu- 

 dinally grooved ; the scutellum and metathorax ruggedly punctured. 

 The abdomen longitudinally grooved, the grooves on the basal 

 segment punctured; the node rugged and subglobose, beneath, 

 furnished with a remarkable flattened semitransparent appendage. 

 Hab. Borneo (Sarawak). 



6. Ponera rufipes, Jerdon. P. atro-fusca; capite thorace nodoque 

 rugosis; abdomine longitudinaliter rude sulcato, pedibus abdominisque 

 apice ferrugineis. 



Worker. Length 5 lines. Obscure fuscous, scarcely black ; the man- 

 dibles, the apex of the scape and of the flagellum, the legs and apex 

 of the abdomen, obscurely ferruginous ; the head, thorax, and node 

 of the abdomen, rugose ; the eyes small, placed forwards on the sides 

 of the head ; the antennae short and thick, the flagellum clavate ; two 

 parallel longitudinal carina; running backwards from the insertion of 

 the antennae to within about one-third of the posterior margin of the 

 head. The thorax obliquely truncated behind, the truncation smooth 

 and slightly shining ; the truncation of the abdominal node smooth 

 and shining, its margin denticulated ; the abdomen coarsely grooved 

 longitudinally. 



Hab. Singapore. Malabar. 



Specimens of this species from Borneo have the legs nearly or quite black. 



7. Ponera intricata. P. nitida nigra; capite, thorace abdominisque 

 basi profunde et aequaliter striatis ; nodo spinis duabus acutis armato ; 

 pedibus ferrugineis. 



Worker. Length 5 lines. Black and shining ; the mandibles, legs, and 

 apex of the abdomen, ferruginous; the flagellum obscurely ferruginous ; 

 the head evenly and deeply grooved, longitudinally on the face, and 

 transversely on the vertex ; the antennae as long as the insect. 

 Thorax : the dilated portion with transverse grooves on the disk which 

 are enclosed by curved ones ; the thorax is much compressed, with a 

 longitudinal groove above, the sides obliquely striated ; the oblique 

 truncation at the apex transversely striated. The node of the abdo- 

 men compressed, rounded above and in front, and obliquely grooved ; 

 the margin of the truncation with two acute spines above directed 

 backwards; the basal segment of the abdomen with curved striae, 

 slightly impressed or obliterated at the sides ; the apical margins of 

 the segments rufo-piceous. 



Hab. Borneo (Sarawak). 



8. Ponera geometrica. P. nigro-aenea; capite, thorace abdominis- 

 que basi profunde striatis, nodo spinis duabus acutis armato. 



Worker. Length 5 lines. Black, with more or less of a bronze tint : 

 the head longitudinally striated ; the clypeus angulated in front ; the 



