On Lepidoptera from Rodriguez. 407 



third joint ; the flagellum about eighteen-jointed, and rather 

 longer than the peduncle. Gnathopoda of both pairs small 

 and weak ; the first pair with the three terminal joints short, 

 subequal, and not dilated ; the second pair (in some speci- 

 mens) longer, with the propodos slightly dilated and the 

 dactylos quite" rudimentary (as in T. platycheles). First three 

 pairs of pereiopoda short ; fourth and fifth pairs considerably 

 longer, with the basa moderately developed. First three 

 segments of the pleon with the posterior margin straight, 

 the infero-posterior angle acute and, in the third segment, 

 slightly produced backward. The distal extremities of the 

 joints of the antennae, the pereiopoda, and the rami of the 

 pleopoda are fringed with short hairs. 



Hob. Rodriguez. This species was found by Mr. Gulliver 

 under stones in damp places, but never observed actually in 

 the water. 



I feel no hesitation in referring this species to the genus 

 Talitrus^ as in none of the specimens are either pair of 

 gnathopoda largely developed and subcheliform as in other 

 genera of Orchestiidse. It differs from the common European 

 T. locusta in its much shorter and slenderer inferior antennge, 

 and in the form of the segments of the pleon. It seems to 

 be more nearly allied to T. platycheles ^ Gu^rin, from South 

 Europe ; but from this species it differs in the proportional 

 length of the joints of the peduncles of the antennse, in the 

 longer second pair of gnathopoda, the much greater length of 

 the fourth and fifth pairs of pereiopoda, &c. 



XLVII. — Preliminary Notice of new Species of Lepidoptera 

 from Rodriguez. By ARTHUR Gardiner BuTLER, F.L.S., 

 F.Z.S., &c. 



As some time will elapse before the detailed account of the 

 collections made by the Naturalists accompanying the Transit- 

 of- Venus expeditions will be published by the Royal Society, 

 diagnoses of the new species of Lepidoptera, Orthoptera, and 

 Hemiptera are submitted in this and the following paper. 



Noctuina. 



Genus Caradrina. 



Caradrina expolita^ n. sp. 



Primaries glossy brown, reniform spot indistinct, a brown 

 streak below it ; a waved dark brown transverse line towards 

 the base ; a transverse postmedian line, arched, with its lower 



