HYMENOPTERA. 107 



being, that, with the exception of its mandibles and the apex of 

 the abdomen, it is black ; the posterior margin of the node of the 

 peduncle is furnished with three sharp spines, not serrated. 



Hab. Borneo (Sarawak). 



6. PACHYCONDYLA PILIVENTRIS. B.M. 



Worker. Length 6 lines. Black : head oblong and rugose; 

 the mandibles and antennte obscurely ferruginous. Thorax of the 

 same form as in P. crassinoda, rugose and obliquely truncated 

 posteriorly ; legs obscurely fusco-ferruginous, the apex of the 

 joints brighter. Abdomen : the posterior margin of the node of 

 the peduncle not serrated ; the first and second segments grooved 

 as in P. crassinoda, but less coarsely so ; the apical segments 

 rufo-testaceous ; the abdomen covered with rather long pu- 

 besence. most dense at the apex. 



Hab. Australia (Adelaide). 



7- PACHYCONDYLA BISPINOSA. 



Worker. Length (> lines. Closely resembling P. rufipes, the 

 mandibles, legs and antennas being red ; the thorax and head 

 similarly sculptured ; the metathorax truncate, the margin of the 

 truncation with a stout curved spine on each side ; the node of 

 the peduncle has its posterior margin denticulate, with a longer 

 tooth at the lateral angles and a tooth beneath ; the first and 

 second segments of the abdomen longitudinally grooved; the 

 apical segments rufo-testaceous. 



Hab. Australia? (Coll. F. Smith.) 



8. PACHYCONDYLA ASTUTA. B.M. 



Worker. Length 5 lines. Black : the mandibles, flagellum. 

 tibiae arid tarsi ferruginous; the head oblong and delicately 

 striated longitudinally. Thorax elongate, rounded anteriorly and 

 obliquely truncate posteriorly ; the prothorax striated, the striae 

 somewhat obliquely curved ; the meso- and metathorax slightly 

 rugose. The node of the abdomen compressed, thick and bent 

 forwards, the upper margin rounded, the anterior and posterior 

 surfaces transversely striated. Abdomen oblong, slightly pilose 

 and shining ; the posterior margins of the segments rufo-piceous, 

 the apex ferruginous. 



Hab. Australia. 



