Genera of the Cossonidce. 585 
regarded as an ofislioot of Rhyncolus, was established by 
myself in 1861 to receive the " Ilt/Iastes c7'assicor?iis" of 
Brulle, — a Ht/lastes-shaped Cossonid whicli 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 ago, from M. 
Tarnier of Dijon, as the " R. chloropus'''' — with which, I 
need hardly add, it has scarcely anything in common. 
Judging therefore from the thi'ee 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 sculptiu'ed, 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 antenna3, — 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 will be 
found to be exclusively of pine-infesting habits ; and it is 
far from impossible that the species which I have emm- 
ciated in the latter portion of this memoir, ixnder the name 
of E. gravidicornis, may prove to have come from the 
region of the Pyrenees. 
112. Rhyncolus (Germar, Ins. Spec. Nov. 307. 1824). 
— Like Phlceophagus and Cossonus, the genus Rhyyicohis 
has had many forms assigned to it, by various authors, 
which win 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, Perris), Stereocorynes (for the truncorum, Germ.), 
of possible conl'usion. Since however the Muuich Catalogue, aud others, 
have not accepted this alteration on my part, which would ajipear to be 
deemed by them to have been unnecessary, I have thought it better to 
revert to the original nomenclature. 
