310 Mr. Frederick Bates on 



metasternum elongate : epimera of the mesothorax 

 oblique^, triangular, not sublinear ; prosternal process 

 terminating behind in a small, compressed, pointed 

 tubercle : legs and ta7'si much more slender, the hind tibiae 

 sinuous. 



This genus will form the type of a new section or 

 " group " in the subfamily : distinguished from its allies 

 by its elongate, slender, and depressed form : its large 

 transverse eyes, approximate beneath : subcylindrical 

 prothorax — the pronotum being confounded with its 

 parapleurge : long, narrow, depressed elytra — not sud- 

 denly declivous behind ; elongate metasternum ; and 

 simple epistoma. From Thomson^s genus Evelina 

 (Musee Scientif. p. 22) — which must be nearly related — 

 it may at once be distinguished by its hexagonal mentum, 

 large transverse eyes, and triangular intercoxal process. 

 The Evaniosomus procerus,'^ Erichson, (Archiv. 1847, I. 

 p. 113) has also some points of resemblance to Aryenis, 

 but the form of the eyes, prothorax, elytra, &c., are 

 quite distinct. 



An example of the present genus stands labelled in the 

 Lafertean collection " Isotoma rufescens," an insect in- 

 cluded by Dejean in the old family Trachelides , Lat., and 

 there is certainly some excuse for so placing it, as in its 

 head contracted^behind into a neck ; its somewhat protu- 

 berant anterior coxae ; large, approximate eyes ; and 

 slim and elegant habit — it is marvellously like some 

 species of the genus Statira. 



Aryenis rufescens, n. sp. (PL XV. fig. 1) . 



Length 4 j to 4^ lines ; entirely (save the eyes which are 

 more or less black) of an uniform pale rufous or yellowish 

 ferruginous, with the palpi a little paler ; shining ; 

 mentum rather strongly, but not closely, punctured ; 

 epistoma much produced antei-iorly, confounded with the 

 front ; head with the long slender carina, or supra- 

 orbital ridge, within each eye, as in Evaniosomus, but 

 slighter and fainter ; somewhat strongly rugose-punctate 



* I think this species generically distinct from Evaniosomus by its dif- 

 ferently formed antennae, having joint 3 decidedly longer than 2 or 4 : its 

 non-carinate elytra : the epipleural fold broadest at the shoulders, not 

 arched nor expanded in the middle ; its subelongate metasternum ; the 

 subtriangular form of the epimera of its mesothorax, &c. I propose to 

 name it Cliorasmixi,s. (See PI. XV. fig. 2). 



