HYMENOPTERA. 175 



11. PHEIDOLE JANUS. PL IX. figs. 13-17- B.M. 



Worker major. Length 2 lines. Head enormously enlarged, 

 of a shining, obscure reddish-brown, deeply emarginate behind, 

 and with a central deeply impressed line running forwards to the 

 insertion of the antennae ; the anterior portion of the head and the 

 mandibles striated, the latter very stout, their inner edge smooth, 

 and with a single notch at their apex ; the antenna? and legs 

 pale rufo-testaceous, the thorax, nodes of the peduncle, and base 

 of the abdomen, rather darker ; the club of the antennae 3-jointed, 

 the thorax narrowed behind and armed with two short acute 

 spines ; the abdomen, except the base, fusco-ferruginous. 



Worker minor. Length a little over a line. Rather darker 

 than the large worker, the antennae longer, the head much smaller 

 in proportion, with the mandibles denticulate on their inner mar- 

 gin ; the body entirely smooth and shining. 



Hab. Ceylon. 



12. PHEIDOLE TAPROBAN^. B.M. 



Female. Length 6J- lines. Black, with obscure ferruginous 

 tints on the face anteriorly, the sides of the thorax and nodes of 

 the peduncle : the head longitudinally striated before the ocelli, 

 and transversely striated on the vertex behind them ; the clypeus 

 smooth and shining, the mandibles shining and slightly punc- 

 tured ; the antennae pale rufo-testaceous ; the ocelli large, and 

 of glassy brightness. Thorax ovate ; the disk shining, with a 

 few scattered punctures, obliquely striated at the sides anteriorly, 

 and longitudinally so towards the scutellum, the latter smooth, 

 shining and very convex ; the metathorax truncate, the trunca- 

 tion transversely striated, the upper portion rugose and armed 

 on each side with a short stout acute spine ; the legs ferruginous. 

 Abdomen ovate, smooth and shining ; the first node of the pe- 

 duncle, viewed sideways, is wedge-shaped, transversely striated 

 and emarginate above, beneath, with a longitudinal central flat- 

 tened appendage ; the second node wider than the first, trans- 

 verse, and narrowed towards the abdomen, its anterior margin 

 smooth and shining. 



Hab. Ceylon. 



13. PHEIDOLE RUGOSA. B.M. 



Worker. Length 3J lines. Ferruginous and very pubescent : 

 the head very large, deeply emarginate behind and with a deeply 

 impressed central channel, extending to the anterior margin of 

 the face ; the head and thorax closely and coarsely punctured, 



