62 



HYMENOPTERA. 



15. POLYRHACHIS DEFENSUS. PI. IV. fig. 27. B.M. 



Worker. Length Sir lines. — Head and thorax black ; abdomen 

 opake rusty-red. Head and thorax coarsely shagreeued, the 

 latter armed with two long stout spines in front and two similar 

 ones at the angles of the metathorax. Abdomen globose ; the 

 scale of the peduncle with two long stout spines diverging and 

 cm-ving backwards. 



Hab. Singapore. Java. 



Some specimens from Java have the abdomen black. 



16. POLYRHACHIS L^VIGATUS. 



"Worker. Length 2}t lines.— Black, smooth and shining : the 

 antennaj with the flagellum thickened at the apex. Thorax : the 

 anterior angles acute, the disk convex, the metathorax with two 

 long, acute, divergent spines directed backwards ; the coxae and 

 femora ferruginous, the anterior pairs obscure. Abdomen glo- 

 bose ; the scale of the petiole with a long curved spine on each 

 side, directed backwards to the curve of the abdomen. 



Hab. Malacca. (CoU. W. W. Saunders, Esq.) 



17- POLYRHACHIS TEXTOR. PI. L fig. 2. B.M. 



Worker. Length 3^ lines. — Black : the head delicately ragu- 

 lose ; the eyes ovate, lateral, and placed high on the head ; the 

 front with two raised bent carinse, at the sides of which the 

 antennae are inserted; the clyjieus and the space between the 

 antennae rufo-piceous, the former with a shght longitudinal cen- 

 tral 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 metathorax deUcately ru- 

 gulose ; the prothorax with a short blunt tooth or spine on each 

 side; the metathorax has also a minute tooth at the lateral 

 superior angles ; legs elongate, without spines or hairs, the tips 

 of the claw-joints of the tarsi ferruginous. Abdomen smooth, 

 highly polished ; the scale of the peduncle with a single acute 

 spine above, and a minute one on each si'de at its base. 



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



The nest of this species is figured in PI. IL fig. 2. 



18. POLYRHACHIS CARBONARIUS. 



Worker. Length 2 lines. — Jet-black and shining: the head 

 and thorax longitudinally aciculate above, the thorax most finely 



