HYMENOPTERA. 



thorax very thinly covered with sericeous down ; the abdomen 

 with a dense pale golden pubescence ; the mandibles and flagel- 

 lum ferruginous ; the tarsi have their apical joints obscurely fer- 

 ruginous. Head large, much wider than the thorax, emarginate 

 behind ; the clypeus with a central longitudinal carina, in a line 

 with which a slightly impressed line runs upwards nearly to the 

 emargination of the vertex. Thorax compressed posteriorly. 

 Abdomen : all the segments with a narrow white apical margin. 

 Worker minor. Length 2} lines. This differs in having the 

 head much narrower and more elongate ; the thorax is also more 

 elongate ; otherwise it resembles the large worker. 



Hab. Port Natal. (Coll. R. W. Plant.) 



117. FORMICA COGNATA. B.M. 



Worker major. Length 5-.V lines. Extremely like F. macu- 

 lata, which it may be : the antenna? and head as in that spe- 

 cies ; the legs entirely ferruginous ; the abdomen entirely black ; 

 in other respects the same as in F. maculata. 



Worker minor. This insect differs from the small worker of 

 F. maculata : the head is of a different form, being narrowed 

 slightly behind the eyes, and is more sharply emarginate behind ; 

 the scale of the peduncle is more elongate and pointed at the 

 apex ; the abdomen entirely black, and the legs red. Notwith- 

 standing the differences pointed out, this species will probably 

 prove to be a variety of F. maculata. 



Hab. Port Natal. 



118. FORMICA BRULLEI. B.M. 



Formica carinata, Brulle, Hist. Nat. II. Canar. Zool. ii. 84. 1 $ . 

 Hab. Canary Islands. 



119. FORMICA FABRICATOR. B.M. 



Female. Length 5-J- lines. Black, smooth and shining : the 

 flagellum, legs, thorax at the sides, and beneath, the apex of the 

 metathorax and the base of the thorax beneath, pale rufo-testa- 

 ceous. Head subquadrate and emarginate behind ; the clypeus 

 subcarinate in the middle, above which in the centre between 

 the antenme is a slightly impressed line of the same length as 

 the carina on each side of it ; eyes ovate, placed rather high on 

 the sides of the head. Thorax elongate-ovate. Abdomen ovate ; 

 the scale of the peduncle subovate and entire. 



Worker major. Length 3-J lines. Of a paler colour than the 

 female ; the head and the thorax above rufo-piceous ; the legs, 



