22 HYMENOPTERA. 



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

 a few pale ferruginous hairs ; 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 perfectly 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 antennae, the anterior margin of 

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

 subhy aline, the nervures and tegulae pale ferruginous. Abdomen 

 shining, pale ferruginous beneath; the scale of the peduncle 

 subquadrate, slightly emarginate its entire width above. 



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



15. FORMICA IRRITANS. B.M. 



Worker. Length 2-^6 lines. Head and abdomen nigro- 

 fuscous ; antennae, 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\-3% lines. Chestnut-brown : 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.) 



77- FORMICA GRACILIPES. B.M. 



Worker. Length 2 lines. Pale ferruginous : abdomen dark 



