88 HYMENOPTERA. 



18. PONERA APICALIS. 



Female. Length 3^ lines. Black : the antennae, mandibles, 

 legs, and apex of the abdomen ferruginous ; the head finely sha- 

 greened. Thorax oblong-ovate, finely longitudinally rugulose ; 

 the sides of the metathorax coarsely rugose, the truncation 

 transversely striated ; the node of the peduncle incrassate, 

 rounded above, and transversely striated in front and behind ; 

 the abdomen shining, and with a fine thin grey pubescence. 



Hab. Borneo (Sarawak). (Coll. W. W. Saunders, Esq.) 



19. PONERA IRIDESCENS. 



Worker. Length 2 lines. Rufo-fuscous, smooth and shining, 

 with iridescent tints of blue ; antennas arid legs, the apex of the 

 metathorax, and the apical margins of the segments of the abdo- 

 men, ferruginous ; the head with an abbreviated impressed line 

 above the insertion of the antennae ; the mandibles with their 

 inner margin serrated, and three larger teeth at their apex ; the 

 scale of the abdomen compressed, elevated and rounded above. 

 Abdomen oblong, the apical margin of the first segment slightly 

 constricted. 



Hab. Borneo (Sarawak). (Coll. W. W. Saunders, Esq.) 



20. PONERA RUGOSA. B.M. 



Female. Length 3-J- lines. Ferruginous ; the head coarsely 

 and deeply punctured, the punctures semi-confluent; the an- 

 tennae short and thick ; the flagellum clavate and pubescent; 

 the mandibles longitudinally grooved. Thorax oblong, widest in 

 front, the anterior margin rounded, the lateral angles acute ; the 

 metathorax truncate ; the prothorax with large deep confluent 

 punctures ; the mesothorax longitudinally grooved ; the scutel- 

 lum arid metathorax ruggedly punctured. The abdomen longi- 

 tudinally grooved, the grooves on the basal segment punctured ; 

 the node of the peduncle rugged and globose : beneath, furnished 

 with a remarkable semitransparent flattened appendage. 



Hab. Borneo (Sarawak). 



21. PONERA INTRICATA. B.M. 



Worker. Length 5 lines. Black and shining : the mandibles, 

 legs, and apex of the abdomen ferruginous ; the flagellum ob- 

 scurely ferruginous ; the head evenly and deeply grooved, lon- 

 gitudinally so on the face, and transversely so on the vertex; 

 the antennae as long as the insect. Thorax : the dilated portion 

 with transverse grooves on the disk, enclosed by curved ones ; 



