Genera of the Cossonida. 505 
in its exceedingly minute size ; in its surface, although 
deeply sculptured, being very much less so than in that 
subfamily ; in its slenderer rostrum, which has the antennse 
implanted a trifle before (instead of behind) the middle ; 
in its elytra being more attenuated posteriorily, and with- 
out any trace either of costce or of the cariniform structure 
on either side of their apex ; in its antennas (which are 
much less incrassated) having their scape suddenly thick- 
ened into a very elongate apical knob, their funiculus- 
joints (the second one of which is appreciably longer than 
those which follow it) more loosely connected inter se, and 
their club larger and more abrupt ; in its femora being 
armed beneath with a very small and indistinct tooth ; 
and in its feet (which, as just stated, are pseudotetramerous) 
being broader and more abbreviated, — the first and second 
articulations (particularly the latter) being transverse, the 
third one deeply bilobed (but with the lobes not divari- 
cating), and the ultimate one (the claws of which are very 
largely developed) slioii and thick. 
2. PsiLODRYOPHTHOEUS (nov. gen.). — In its 4-jointed 
funiculus, transverse eyes, obsolete scutellum, costate elytra, 
and slender, pentamerous feet, the remarkable insect for 
which the present genus is established, and which has 
been communicated by Mr. Pascoe as having been taken 
by Mr. Wallace at Saylee, in the north-Avest d? New 
Guinea, is essentially a Dryophthorid ; and yet it is an 
exceedingly anomalous member of its subfamily, more 
especially in the fact of its sm-face (instead of being opake 
and thickly besmeared Avith dirty, mud-like scales) being 
slightly shining, and almost bald, — the punctures only (or 
a certain portion of them) being fiUed-up with the parti- 
cular kind of brown deposit which is so characteristic of 
the immediately-allied forms. And it is further conspi- 
cuous for its prothorax (which is largely developed) being 
almost as wide behind as the base of the elytra, and nearly 
eve7i, — there being scarcely any indication of inequalities, 
or of an anterior constriction ; and for its elytra being 
broadly and distinctly scooped-out in front (causing the 
shoulders to appear prominent, or porrect), and without 
any tendency to be cariniform at their apex. Its rostrum 
is rather short, thick, and cylindrical (being of nearly 
equal breadth throughout), and is not roughened as in the 
generality of the Dryophthorides. 
