572 Mr. T. Vernon Wollaston on the 
to the two species from Cejlon, in tlie 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 Avhich Mr. Pascoe has communicated as coming from 
Champion Bay in Western Australia, is manifestly akin 
to Stereoborus and Stereotrihus, 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 shoi't conical feet and the pecvdiarly 
formed rostrum of the latter, and of the groups Avhich are 
allied to it ; and its affinities appear to me to be clearly 
with Stercotribus, — Avith 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 Stcreotribus, not only does the form of its almost 
baitalbj-unsinuated prothorax and elytra and the structure 
of its inner tibial spur shew it to be unmistakeably distinct ; 
but its antenna3 (which are im])lanted further from the 
apex of the rostrum) are considerably thicker and diffin-ently 
constituted, — their scape being extremehj robust, sub-tor- 
tuous, and powerfidly clubbed, their funiculus remarkably 
broad, but Avith the joints nevertheless (instead of being 
compact) sharply and deeply separated from each otlicr, 
and their capitulum small and narrow (as in the RliyncoU). 
Its rostrum, which is a good deal rounded-outwards ante- 
riorly, has a Avide channel behind (AAdiich arises from a 
large frontal foA'ca) ; 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 
arc longer, and not quite so broad, — both of Avhich points 
are particularlv observable as regards the tibiae ; and the 
front pair of the latter are less decidedly augmented in- 
ternally by a lamelliform portion tOAvards their base. Its 
colour, too, is less intensely black, — the anterior segments 
