572 Mr. T. Vernon AVollaston on the 



to the two species from Ceylon, in the event of its being 

 found desirable ultimately to detach them from the others ; 

 though I scarcely imagine that their slight structural 

 peculiarities of rostrum and club are of sufficient import- 

 ance to indicate more than perhaps a geographical modifi- 

 cation of a rather plastic type. 



90. STEREOMIMETES (nov. gen.}. The rather large 

 Cossonid which constitutes the type of the present genus, 

 and which Mr. Pascoe has communicated as coming from 

 Champion Bay in Western Australia, is manifestly akin 

 to Stereoborus and Stereotribus, though at the same time 

 approaching in the outline, colour, and sculpture of its 

 oblong prothorax, as well as in the bipartite structure of 

 the spine which arises from the inner angle of its four 

 posterior tibiae, the genus Phacegaster. However it 

 entirely wants the short conical feet and the peculiarly 

 formed rostrum of the latter, and of the groups which are 

 allied to it ; and its affinities appear to me to be clearly 

 with Stereotribus, with the aberrant members of which, 

 from Ceylon, it very much agrees in (amongst other 

 details) the shape of its robust, posteriorly - narrowed 

 rostrum. 



Despite however the undoubted relationship of this 

 genus to Stereotribus, not only does the form of its almost 

 basally-unsinuated prothorax and elytra and the structure 

 of its inner tibial spur shew it to be unmistakeably distinct ; 

 but its antennae (which are implanted further from the 

 apex of the rostrum) are considerably thicker and differently 

 constituted, their scape being extremely robust, sub-tor- 

 tuous, and powerfully clubbed, their funiculus remarkably 

 broad, but with the joints nevertheless (instead of being 

 compact) sharply and deeply separated from each other, 

 and their capitulum small and narrow (as in the Rhyncoli}. 

 Its rostrum, which is a good deal rounded-outwards ante- 

 riorly, has a wide channel behind (which arises from a 

 large frontal fovea) ; its eyes (as in the neighbouring 

 groups) are very prominent ; its prothorax is much less 

 coarsely punctured, and its elytra are more strictly parallel, 

 than is the case in Stereotribus and Stereoborus ; its legs 

 are longer, and not quite so broad, both of which points 

 are particularly observable as regards the tibia3 ; and the 

 front pair of the latter are less decidedly augmented in- 

 ternally by a lamelliform portion towards their base. Its 

 colour, too, is less intensely black, the anterior segments 



