HYMENOPTERA. 61 



yellow ; wings subhyaline, nervures pale testaceous, stigma 

 brown. Abdomen : the scale of the peduncle quadrate, armed 

 with two short acute curved spines. 



Worker. Length 2 lines. Very like the female, but with the 

 antennae and legs of a deeper tint. The thorax with the sides 

 flattened, the disk slightly convex, divided by two distinct sutures. 

 The abdomen and scale as in the female. 



Hab. Singapore. (Coll. W. W. Saunders, Esq.) 



12. POLYRHACHIS HECTOR. 



Worker. Length 4 lines. Opake-black; delicately shagreened : 

 the thorax armed with two long acute divergent spines in front, and 

 two slightly divergent ones on the metathorax ; the legs without 

 spines or pubescence, the calcaria black ; the disk of the thorax 

 convex. Abdomen with an obscure ferruginous tinge ; the scale 

 of the petiole quadrate, with two long divergent spines above 

 which curve backwards. 



Hab. Singapore. (Coll. W. W. Saunders, Esq.) 



13. POLYRHACHIS MODESTUS. 



Female. Length 3 lines. Black : the thorax ovate ; the 

 metathorax with two short blunt spines ; the scale of the pe- 

 duncle quadrate, armed above at the lateral angles with an acute 

 spine which curves backwards. The head and thorax very deli- 

 cately rugose ; the flagellum rufo piceous at the apex beneath ; 

 the wings flavo- hyaline, the nervures pale testaceous ; the apical 

 joints of the tarsi obscurely ferruginous. The abdomen globose, 

 smooth and shining. 



Hab. Singapore. (Coll. W. W. Saunders, Esq.) 



14. POLYRHACHIS CHALYBEUS. B.M. 



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, di- 

 verging outwards, and two shorter erect parallel ones on the 

 metathorax; the femora and tibiae compressed. Abdomen smooth 

 and shining, the peduncle armed with two long stout diverging 

 spines which are bent backwards. 



Hab. Singapore. Malacca. 



