194 



HYMENOPTERA. 



4. MERANOPLUS MUCRONATUS. B.M. 



Worker. Length 2-2 lines. Head, thorax and legs ferru- 

 ginous, the abdomen black; the thorax quadrate, each angle 

 produced into a long acute spine ; the head, thorax, and nodes 

 of the peduncle coarsely rugose ; the head narrowed before the 

 eyes, and widely emarginate in front ; the eyes prominent, be- 

 hind them the margins of the head are widened, and again nar- 

 rowed to the lateral angles, which are rounded ; the head and 

 thorax with a few scattered long reddish hairs. The hinder mar- 

 gin of the thorax with two short blunt spines in the middle, 

 outside of each is a very minute tooth or spine ; the metathorax 

 smooth, shining, and concavely truncate ; in the middle of the 

 lateral margins of the truncation is a long slender acute spine ; 

 the legs and abdomen sprinkled with very long ferruginous 

 hairs. 



Hab. Malacca (Mount Ophir). 



On a ticket attached to specimens of this species, Mr. Wallace 

 writes, "House-Ant," but we have no further information. 



5. MERANOPLUS CASTANEUS. 



Female. Length 3J lines. Chestnut-red : head and thorax 

 longitudinally subrugose ; the metathorax with two small teeth 

 or spines ; the second node of the peduncle with a minute spine 

 posteriorly ; the flagellum obscurely ferruginous ; the teeth and 

 eyes black ; the metathorax truncate, the centre of the trunca- 

 tion finely striated longitudinally ; the legs with scattered pale 

 hairs ; the base of the femora obscurely ferruginous. Abdomen 

 ovate, finely punctured, and sprinkled with long pale hairs ; the 

 nodes of the peduncle rugose ; the first, viewed laterally, wedge- 

 shaped, and produced into an angular tooth or process at its base ; 

 the second subquadrate ; both are sprinkled with long erect hairs. 



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



6. MERANOPLUS GRACILIS. B.M. 



Worker. Length 2J lines. Black : head convex, subopake, 

 and finely punctured ; eyes large, prominent, placed forwards on 

 the sides of the head, the posterior angles rounded ; the clypeus 

 concave, or depressed in the middle, its anterior margin widely 

 but slightly emarginate. Thorax longitudinally rugose, inter- 

 mixed with deep punctures, elongate and narrowed to the base 

 of the mesothorax ; the anterior margin of the prothorax arched, 

 with the lateral angles subacute ; the posterior lateral angles of 



