On 7iew Species of Hymenoptera from Rodriguez. 447 



LII. — Preliminary Notice of neto Species of Hymenoptera^ 

 Diptera^ and Forficulidce collected in the Island of Rodri- 

 guez hy the Naturalists accompanying the Transit-of-Venus 

 Expedition. Bj Feedekic'k Smith. 



In anticipation of a detailed account of the collections made 

 in the Island of Rodriguez by Messrs. Gulliver and Slater, 

 I hereby submit diagnoses of the new species of the orders 

 examined by me. 



FormicidaB. 



Tapinoma palUpes. 



Worker. Length 1^ line. Head and thorax reddish brown, 

 , abdomen dark brown ; eyes black ; mandibles and antennai 

 pale testaceous. Thorax rounded anteriorly, slightly narrowed 

 posteriorly, with the metathorax obliquely truncate ; the legs, 

 petiole, and squama pale testaceous, the latter rounded above. 

 Abdomen smooth, shining, and impunctate. 

 (Coll. by Gulliver.) 



Tapinoma fragile. 



Worker. Length 1 line. Head brown, smooth, and shining, 

 the eyes black ; mandibles white and pellucid, antennaj also 

 white. Thorax pale brown, the sides and metathorax darker 

 brown ; the prothorax rounded in front ; the metathorax 

 oblique and concave ; the legs, petiole, and squama pale testa- 

 ceous, nearly white. Abdomen brown, smooth, and shining, 

 palest at the base. 



Found under bark ; very like the preceding species, but 

 smaller j the legs and antennge pellucid. (Coll. by Gulliver.) 



Monomorium impressum. 



Female. Length If line. Head and abdomen dark fusco- 

 ferruginous. The clypeus, mandibles, and antennse flavo- 

 testaceous ; ocelli distinct, with an impressed line in front of 

 the anterior one extending to the insertion of the antennae ; 

 the apex of the scape and the club of the flagellum slightly 

 rufo-fuscous. Thorax narrower than the head and one third 

 longer ; the prothorax rounded in front, the sides nearly 

 parallel, slightly narrowed towards the metathorax ; the legs 

 pale testaceous, the femora rufo- testaceous ; the tarsi colourless 

 and pellucid ; the thorax testaceous, as well as the nodes of the 

 petiole. Abdomen oblong-ovate, as long as the head and 

 thorax. 



