COLLECTED IN BORNEO, ETC. 63 



spinis "duabus longis acutis retrorsum directis ; abdominis squama 

 spinis duabus curvatis armata ; coxis femorumque basi rufis. 



Worker. Length 2\ lines. Black, smooth and shining : the flagellum 

 thickened towards the apex. Thorax : the anterior angles acute ; the 

 disk not flattened ; the metathorax with two long, acute, divergent 

 spines, directed backwards ; the scale with a long curved spine on 

 each side, directed to the curve of tbe abdomen; the coxae and femora 

 ferruginous, the anterior pair obscure. Abdomen globose, smooth and 

 shining. 



Hob. Malacca. 



I have only seen a single specimen of this species : the clavate antennae 

 appear to indicate its belonging to a different genus. 



16. Polyrhachis cuspidatus. P. niger ; prothorace metatho- 

 raceque medio elevatis et bispinosis; femoribus abdominisque basi 

 ferrugineis. 



Worker. Length 2\ lines. Black : head subovate, not narrowed be- 

 hind ; the base of the scape, the apex of the flagellum, and the tips of 

 the mandibles, ferruginous. Thorax slightly compressed; the pro- 

 thorax with an elevation in the middle which terminates above in two 

 divergent spines ; there is also a similar elevation, spined above on 

 each side, on the metathorax ; the coxae, femora, and apical joints of 

 the tarsi, ferruginous. Abdomen ferruginous at the base ; the scale 

 quadrate, deeply notched above. 



Hab. Borneo (Sarawak). 



17. Polyrhachis flavicornis. P. niger; capite thoraceque sub- 

 opacis, abdomine nitido ; flagello femorumque basi flavo-testaceis. 



Female. Length 3 lines. Black : the head subopake, the flagellum and 

 mandibles reddish-yellow ; the basal joint of the flagellum, except its 

 extreme apex, black; the scape rufo-piceous. Thorax subopake; 

 ovate, without spines; legs rufo-piceous, the femora pale reddish- 

 yellow; wings subhyaline, nervures pale testaceous, stigma brown. 

 Abdomen fuscous ; the scale quadrate, armed with two short, curved 

 subacute spines. 



Worker. Length 2 lines. Very hke the female, but with the antennae 

 and legs of a deeper tint ; the first joint of the flagellum black, except 

 its apex ; the thorax flattened at the sides, the superior surface slightly 

 convex, divided by two transverse sutures, the margins acute. Abdo- 

 men globose, black and shining ; the scale as in the female. 



Hab. Singapore. 



18. Polyrhachis eouinus. P. niger nitidus; thorace supra de- 

 planato, metathorace et pedunculo bispinosis, pedibus pallide fer- 

 rugineis. 



Worker. Length 3 lines. Black ; head shining and delicately rugulose ; 

 the palpi pale rufo-testaceous. Thorax : flattened above, the margins 

 acutely edged ; the sides longitudinally delicately striated ; the pro- 



