570 Mr. T. Vernon TV r ollaston on the 



of which is rather to be subtriangular, than posteriorly 

 narrowed), and its depressed, less widely separated eyes, 

 added to its very grossly and equally punctured prothorax 

 (which is free from a constriction in front, and is nearly 

 unsinuated at the base), and its convex body, are far more 

 in accordance with what obtains in such sub-Hylastideous 

 groups as Brachytemnus. On the whole, however, I think 

 it will be more natural to retain it in the vicinity of the 

 former, and more especially since their is no appearance 

 of the excessive reduction in the length of the scape which 

 is so characteristic of the latter ; nor yet of the obtusely- 

 desilient apical region of the elytra, the subcontiguous 

 anterior coxas, and the slender feet, of those particular 

 types. Its tibiae are not so abbreviated as in Stereoborus 

 and Stereotribus, and the front pair seem to be simple (or 

 W7z-augmented internally ; its scutellum is largely deve- 

 loped ; and its rostrum, although unprovided with any 

 anomalous tubercles and channel-like fissures, is never- 

 theless obsoletely gibbose, or uneven, on its upper surface. 



88. STEREOBORUS (nov. gen.}. The insects which 

 I would include under the present genus and the follow- 

 ing one, although apparently (for the most part) unde- 

 scribed, are some of them (on account, doubtless, of their 

 rather large size, and dark, shining, deeply-sculptured 

 surfaces) mixed-up in collections with the Cossoni from 

 which, however, they are, nevertheless, totally distinct. 

 Indeed in the construction of their extremely robust and 

 thickened legs they are very peculiar, the femora (though 

 especially the anterior ones) being greatly incrassated, 

 whilst the tibise are unusually short, broad, and somewhat 

 compressed, with the terminal hook powerfully developed ; 

 the front pair moreover being abnormally augmented on 

 their inner edge (at some distance behind the internal 

 angle) by a kind of lamelliform triangular plate (which 

 however only becomes conspicuous when the insect is 

 viewed obliquely). In other respects Stereoborus recedes 

 from Cossonus in its head being considerably larger and 

 broader ; in its eyes (which are rounder and more promi- 

 nent) being consequently much wider apart ; in its rostrum 

 (which is furnished with a narrow, anteriorly-evanescent 

 channel in the centre, arising out of a minute frontal 

 fovea) being conspicuously shorter, broader, and more 

 parallel (in fact nearly quadrate) ; in its prothorax being 

 longer, and somewhat more cylindrical; and in it 



