COLLECTED IN BORNEO, ETC. 61 



clypeus and the space between the antenna;, rufo-piceous ; the elypeus 

 with a slight longitudinal carina ; the mandibles obscurely rufo- 

 piceous at their apex ; the apical joint of the antennae ferruginous. 

 Thorax elongate, compressed at the sides, and flattened above ; the 

 anterior portion longitudinally aciculate ; the meso- and meta-thorax 

 delicately rugulose ; a short blunt tooth or spine on each side of the 

 prothorax, and a similar, but more acute tooth at the superior angles 

 of the metathorax ; the legs elongate, without spines or hairs ; the 

 tips of the claw-joint of the tarsi ferruginous. Abdomen smooth 

 and shining; the peduncle with a single acute spine above, and a 

 minute tooth on each side at its base. 

 Hab. Malacca. 



9. Polyrhachis chalybeus. P. capite thoraceque nigris, pedibus 

 abdomineque chalybeis. 



Worker. Length 4 lines. Black : the metathorax, legs and abdomen 

 steel-blue ; the head delicately rugulose ; eyes ovate, lateral, placed 

 high on the head ; the antennae inserted opposite the lower orbit of 

 the eyes, each at the side of an elevated bent carina ; the clypeus 

 emarginate anteriorly; the mandibles large and stout, their apex 

 denticulate. Thorax elongate, delicately transversely rugulose, with 

 two stout acute spines in front, diverging outwardly, and two shorter 

 erect parallel ones on the metathorax ; the femora and tibiae com- 

 pressed. Abdomen smooth and shining ; the peduncle armed with 

 two long stout divergent bent spines which curve backwards. 



Hab. Singapore. Malacca. 



10. Polyrhachis nitidus. P. nigerrimus, laevis, nitidus ; thorace 

 ovato, metathorace spinis duabus longis acutis, pedunculo quadrato, 

 spinis duabus curvatis acutis armato. 



Female. Length 4 lines. Jet-black, smooth and shining ; the thorax 

 rounded anteriorly ; the metathorax armed with two long acute spines 

 at its base ; the truncation delicately transversely rugulose and shi- 

 ning ; the peduncle quadrate, armed above at its posterior angles with 

 two short curved acute spines; the anterior tibiae rufo-piceous in front; 

 wings subhyaline, faintly tinted with yellow ; the nervures ferruginous; 

 the stigma brown. Abdomen subglobose, very smooth and shining. 



Hab. Borneo (Sarawak). 



11. Polyrhachis villipes. P. niger; thorace spinis duabus elon- 

 gatis acutis antice armato ; abdominis squamula spinis duabus longis 

 acutis, singulis basi minute unispinosis, pedibus pubescentibus. 



Worker. Length 3^-4 lines. Black : the head and thorax longitudi- 

 nally delicately aciculate ; eyes ovate, very prominent, situated high 

 on the sides of the head, the head narrowed posteriorly ; the carinae 

 on the face much elevated ; the palpi pale rufo-testaceous. Thorax : 

 armed in front with two long acute divergent spines ; posteriorly un- 

 armed ; the superior surface flattened, distinctly divided by two trans- 



