72 HYMENOPTERA. 



gins acute; the prothorax with a stout acute spine on each side 

 in front, the divisions of the thorax strongly marked ; the pos- 

 terior angles of the metathorax slightly produced, not spined. 

 The scale of the peduncle incrassate, suhquadrate, with a long, 

 stout spine at each of its superior angles, and a short acute one 

 outside beneath them ; abdomen globose. 



Hab. Port Natal. 



48. POLYRHACHIS MILITARIS. PI. III. fig. 5, & PI. IV. fig. 36. 



B.M. 



Formica militaris, Fabr. Spec. Ins. i. 493. 30 $ ; Mant. Ins. i. 

 310. 37; Ent. Syst. il 362. 50; Syst. Piez. 414. 73. 

 Oliv. Encycl. Meth. vi. 499. 46. 

 Latr. Hist. Nat. Fourm. 124. pi. iv. f. 22 ? . 



Hab. Africa (Guinea; Sierra Leone). 



The type-specimen of this species is in the Banksian Collec- 

 tion ; the insect is covered with a fine cinereous pile, the head 

 and thorax are finely longitudinally rugulose, the spines on the 

 prothorax are short, stout, and acute ; the metathorax quadrate 

 above, with the posterior and lateral margins carinated, the ab- 

 domen sprinkled with erect, pale hairs. 



The male has the head and thorax coarsely rugose, the thorax 

 more elongate than in the female, with two short acute spines in 

 front and two longer ones on the metathorax ; the petiole has 

 only two spines, which are curved backwards over the base of the 

 abdomen ; the latter is elongate- ovate, and covered with fine, 

 silky, cinereous pile. 



The male is in the Collection of W. W. Saunders, Esq. 



49. POLYRHACHIS LABORIOSUS. PI. IV. figs. 21, 22. B.M. 



Worker. Length 4 lines. Black : the abdomen covered with 

 fine, short, golden pubescence. The anterior margin of the cly- 

 peus rounded, and having a slight carina down the middle ; the 

 mandibles short, triangular, and armed with five acute, ferrugi- 

 nous teeth ; the palpi dark fusco-ferruginous ; the head is finely 

 longitudinally rugose, and thinly covered with cinereous pubes- 

 cence. Thorax armed in front with two long acute spines, 

 above, slightly concave, with the lateral margins forming a sharp 

 raised carina, the disk with a little golden pubescence, which is 

 frequently obliterated, the sides with a thin cinereous pubescence. 

 Abdomen subglobose, the node of the peduncle with two long, 

 erect, hooked spines directed backwards. 

 Hab. Sierra Leone. (Coll. Rev. D. F. Morgan.) 



