Genera of the Cossonidce. 585 



regarded as an offshoot of Rhyncolus, was established by 

 myself in 1861 to receive the " Hylastes crassicornis" of 

 Brulle, a Hylastes-shaped Cossonid which infests the 

 pine-trees of the Canarian archipelago ; and a recent exami- 

 nation of some of the discordant species of (so-called) Rhyn- 

 colus has convinced me that the European R. strangulatus is 

 an undoubted member of the same group. Indeed a single 

 example is now before me (described in the after-part of 

 this paper) which is unquestionably a third representative 

 of Eremotes, but I have unfortunately no information con- 

 cerning its precise habitat. However I believe it to be 

 European , it having been purchased by John Gray, Esq. 

 (in whose collection it now is), some years a^o, from M. 

 Tarnier of Dijon, as the tf R. chloropus" with which, I 

 need hardly add, it has scarcely anything in common. 



Judging therefore from the three members which have 

 hitherto been brought to light, Eremotes may be said to 

 differ from Rhyncolus in its species being not only larger, 

 more cylindrical, and more coarsely sculptured, but like- 

 wise in their prothorax being longer, more cylindrical, 

 and more constricted in front, in its rostrum being shorter, 

 broader and thicker, in its eyes being more prominent, 

 and (above all) in the structure of its antennae, which 

 are extremely incrassated, their funiculus especially being 

 thick and robust, and with the second joint so reduced in 

 length as to be almost hidden within the apex of the greatly 

 enlarged basal one. In all probability Eremotes wih 1 be 

 found to be exclusively of pine-infesting habits ; and it is 

 far from impossible that the species which I have enun- 

 ciated in the latter portion of this memoir, under the name 

 of E. gravidicornis, may prove to have come from the 

 region of the Pyrenees. 



112. KHYNCOLUS (Germar, Ins. Spec. Nov. 307. 1824). 

 Like Phlceophagus and Cossonus, the genus Rhyncolus 

 has had many forms assigned to it, by various authors, 

 which will be seen, when carefully examined, to be not 

 strictly on the pattern of its acknowledged type namely, 

 the European R. ater, Linn, (or chloropus, Fab.). Thus, 

 after removing Eremotes (for the reception of the R. stran- 

 gulatus, Perns), Stereocori/nes (for the truncorum, Germ.), 



of possible confusion. Since however the Munich Catalogue, and others, 

 have not accepted this alteration on my part, which would appear to be 

 deemed by them to have been unnecessary, I have thought it better to 

 revert to the original nomenclature. 



