Genera of the Cossonidce. 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 antennas 

 implanted a trifle before (instead of behind) the middle ; 

 in its elytra being more attenuated posteriority, and with- 

 out any trace either of costas 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) short and thick. 



2. PSILODRYOPHTHORUS (nov. (/en.). 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-west of New 

 Guinea, is essentially a Dryophthorid ; and yet it is an 

 exceedingly anomalous member of its subfamily, more 

 especially in the fact of its surface (instead of being opake 

 and thickly besmeared with dirty, mud-like scales) being 

 slightly shining, and almost bald, the punctures only (or 

 a certain portion of them) being filled-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 

 even., 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. 



