Genera of the Cossonidce. 579 



known readily from the neighbouring forms by their eyes 

 being enormously developed and very prominent, by their 

 antennas (which have the second funiculus-joint much ab- 

 breviated, and the club abrupt) being inserted towards the 

 base of their rostrum, and by the latter being exceedingly 

 broad (indeed scarcely narrower than the head), but never- 

 theless parallel, much arcuated, and straightly truncate, 

 or lopped-off, in front. The third articulation of their 

 feet is simple, and their coxae (even the anterior pair) are 

 widely and subequally separated. 



101. PACHYOPS (nov. gen.}. Two examples of the 

 species for which the present genus has been established 

 (which have been communicated by Mr. Pascoe), were 

 obtained by Mr. Wallace at Sarawak in Borneo. They 

 may be known from the allied forms by their narrow, 

 parallel, cylindric, and rather deeply, closely sculptured 

 bodies ; by their broad, thick, convex, greatly exserted 

 head ; by their short and wide rostrum ; by their long, 

 subconical prothorax, which is but lightly constricted in 

 front ; by their elongate scape, and roundish, abrupt, com- 

 pressed, largely-developed club ; and by their coxas being 

 somewhat less separated than is the case in the neigh- 

 bouring groups, the anterior pair being scarcely, if at all, 

 more remote than in the Rhyncoli. 



102. PENTAMIMUS (nov. gen.). Several examples of 

 a Cossonid which I have received from Mr. Pascoe as 

 coming from King George's Sound in southern Australia, 

 and a closely allied species (likewise Australian) which 

 has been communicated by Mr. Fry, have so much the 

 prima facie aspect of large Rhyncoli that they might be 

 almost supposed to pertain to that genus. Yet their 

 5-jointed funiculus, and rounder and more developed club, 

 show them to be altogether distinct ; though their affinities 

 are so unmistakeably with the Rhyncoliform groups that 

 it would be absurd to suppose (on account of the structure 

 of their funiculus) that they have anything whatever to do 

 with the subfamily Pentarthrides. In other respects Pen- 

 tamimus is remarkable for its shining, deeply sculptured 

 and cylindrical body; for its thickened head, and short, 

 broad (though parallel) rostrum ; for its somewhat incras- 

 sated antennas (which are implanted a little behind the 

 middle of the latter) having their scape a good deal 

 lengthened and backwardly curved ; and for its legs being 

 rather long and thick, with the third tarsal joint simple. 



