22 HYMENOPTERA. 



three following, and the base of the fifth black ; sprinkled with 

 a few pale ferruginous hau-s ; the scale ovate, emarginate above. 



Hab. Birmah. 



This species somewhat resembles the F. variegata, but it is a 

 larger and broader insect ; the scale of the peduncle is of a dif- 

 ferent form, being broader; the thorax is jjerfectly oval, not 

 narrow behind, and it is also much more polished and shining. 



74. Formica diligens. 



Female. Length 9 lines. — Dark rufo-piceous ; the antennae, 

 mandibles, thorax at the sides and beneath, the metathorax and 

 legs ferruginous. In form closely resembling Formica ligni- 

 perda ; the head shining ; the antennre, the anterior margin of 

 the face and clypeus, and the mandibles ferruginous. The wings 

 subhyaliue, the nervures and tegulse pale ferruginous. Abdomen 

 shining, pale ferruginous beneath; the scale of the peduncle 

 subquadrate, slightly emarginate its entire width above. 



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



75. Formica irritans. B.M. 



Worker. Length 2,}-6 lines. — Head and abdomen nigro- 

 fuscous; antennaj, thorax, abdomen, scale of the peduncle and 

 the legs ferruginous. Elongate and slender; head ovate; the 

 scape black, with the apex ferruginous. Thorax elongate, com- 

 pressed, the prothorax slightly dilated at the sides ; the scale of 

 the peduncle incrassate, rounded in front and truncate behind. 

 Abdomen ovate ; the entire insect sprinkled with erect pale hairs. 



Worker minor, length 3 lines; the antennae entirely ferru- 

 ginous. 



Hab. Malacca. 



76. Formica badia. 



Worker. Length 2|-3i lines. — Chestnut-brou-n : closely re- 

 sembling Polyergus rufescens, but with the mandibles toothed ; 

 head subovate ; the eyes ovate, placed high on the sides of 

 the head towards the vertex. Thorax rounded in front, com- 

 pressed behind ; the metathorax obliquely truncated. Abdomen 

 oblong-ovate, the apex fuscous; the scale of the peduncle in- 

 crassate, slightly rounded in front and flattened behind. 



Hab. Singapore; Borneo (Sarawak). (Coll. W. W. Saunders, 



Esq.) 



^^. Formica gracilipes. B.M. 



Worker. Length 2 lines. — Pale ferruginous : abdomen dark 



