24 hymknoptera. 



81. Formica mistura. 



Female. Length 6^ lines.— Black : the hinder margin of the 

 vertex, the coxae, femora and tips of the tarsi, the scale of the 

 peduncle and the base of the abdomen more or less obscurely 

 ferruginous. Head : the mandibles, clypeus and anterior angles 

 of the face punctured; the clypeus slightly emarginate ante- 

 riorly ; the flagellum fusco-ferrugiuous. Thorax oblong-ovate ; 

 wmgs subhyahne, the nervures rufo -testaceous. Abdomen 

 ovate ; the scale of the peduncle subovate with a slight notch 

 above. Head, thorax, legs and abdomen with a thin fulvous 

 pubescence. 



Hab. Borneo (Sarawak). (Coll. W. W. Saunders, Esq.) 



82. Formica pilosa. 



Worker. Length 3 lines.— Black, densely covered with a fine 

 silky cinereous pile. Head much wider than the thorax ; eyes 

 ovate, placed laterally rather high on the head ; the anterior part 

 of the clypeus truncate, the sides of the face produced beyond 

 its anterior margin ; a shallow fovea on the front. Thorax com- 

 pressed behind. Abdomen ovate, covered with short pale pu- 

 bescence ; the scale of the peduncle incrassate, terminating in a 

 blunt point above. 



Hab. Borneo (Sarawak). (Coll. W. W. Saunders, Esq.) 



83. Formica ruficeps. 



Worker. Length 4 lines. — Black : the head and the thorax 

 in front ferruginous ; the head smooth, shining, and much wider 

 than the thorax ; the mandibles and scape black, the apex of the 

 former ferruginous; the flagellum pale rufo-testaceous. The 

 thorax much compressed behind ; the tips of the coxse, femora 

 and tibiae, and the tarsi ferruginous. Abdomen smooth and 

 shining ; the scale of the peduncle ovate, its apex acuminate ; 

 the legs and the apex of the abdomen with a thin short pale 

 pubescence. 



Worker minor only differs in size and in having the mandibles 

 ferruginous. 



Hab. Borneo (Sarawak). (Coll. W. W. Saunders, Esq.) 



84. Formica fervens. 



Worker. Length 4 lines. — Head and abdomen black, obscurely 

 rufo-piceous ; thorax and legs pale ferruginous. The head sub- 

 opake, with the clypeus and mandibles shining ; the flagellum 

 pale ferruginous; the anterior margin of the clypeus slightly 



