16 TERTIARY RHYNCHOPHOROUS COLEOPTERA. 
each end, as broad as Jong, and preceded by long and slender joints, that 
just preceding the cuneiform joint a little enlarged at the apex. Thorax 
poorly preserved, but apparently a little granulated. Elytra too poorly 
preserved for definite description, not very strongly arched. Hind tibiz 
searcely stouter than the antennal club. Abdominal joints very sparsely 
granulate. 
Length, exclusive of rostrum, 52™"; of rostrum, 2°85™": of 
antennz, 2°1™™. 
Florissant, Colorado, one specimen, No. 13682. 
The species does not appear to agree well with any of the described 
fossil species of Rhynchites most of which, indeed, as already stated, must 
be removed from the genus; and from our modern species it appears to 
differ in its relatively much broader thorax. 
Subfamily ISOTHEIN 4&2. 
The genera belonging here, and especially those of the first tribe, 
have all the aspect of Calandridz, with their elongate form, porrect ros- 
trum, and subconical head; but the relatively great head, ungeniculated 
antennz, the loose club of the same, the four-jointed tarsi, and the subequal, 
completely delimited segments of the abdomen prevent the possibility of 
any such reference. 
They are peculiar among Rhynchitid for the moderate separation of 
the fore and middle coxze and the insertion of the antenne, which is before 
the middle of the basal half of the straight and porrect beak. These char- 
acters show an approach to the Pterocolinee rather than to the Rhynchitide, 
but they have narrow metasternal side pieces. It seems fitting, therefore, 
that they should be separated as a distinct subfamily. 
To judge only from the descriptions and figures of the species of fossil 
Rhynchitidee already described it is highly probable that several of them 
also may fall in this same subfamily, for the two species of Rhynchites 
described from Rott by Heyden, R. hageni and R. orcinus, have the anten- 
nie attached at the very base of the rostrum, showing, at least, that they 
can not properly be placed in Rhynchites, and the same is the case with the 
