96 TEIITIAEY EHYNCHOPHOROUS COLEOPTERA. 



tildes and longitudes, while in the New World they are confined to North 

 America, which possesses about twenty-five species, all of them restricted 

 to the western half of the continent. No genus of Rhynchophora (except- 

 ing that refuge for vague and ill-defined forms, Curculionites) has been so 

 widely recognized in a fossil state. Half a dozen species have been figured 

 from Aix alone, and one of these has been recognized also at Bmnstatt, half 

 a dozen or more others at Oeuingen, besides tw^o at Oorent. In this country 

 four species have been found at Florissant, none elsewhere, this being the 

 only genus of Rln-nchophora I know which is so much more richly devel- 

 oped in Europe than in America. It may be doubted, however, whether 

 all the European fossil species should be placed together. Of these species, 

 our C. forrsfi'ri seems to bear closest resemblance to Oustalet's C. arvenensis, 

 from Aix; our C. exterraneiis resembles not a little the same author's C. 

 ■inflcxm from the same place; and our C. primoris is not very far removed 

 from Heer's C. aspernlns, again from the same; while our C. dcgcneratns is 

 altogether different from anything found in the l^^uro{)ean Tertiaries. 



Tublc of the species of Clconus. 

 Eye circular. 



Ijiirgc species witli sliort sube(Hial rostrum e.rterrdiKUs. 



Smaller species with long taperiug rostrum priinoris. 



Eye transverse. 



Rostrum stout, nearly straigiit, taperiug foerstcri. 



Rostrum sleuder, arcuate, ecjual degeneratus, 



Cleoni's exterraneus. 



1*1. I, Figs. 13, 20. 



1 place this species in this genus oiily as typical of the (Jleonini, for 

 the comj)letely circidar eve would seem to sliow that it can not properK' l)e 

 included in it. (Jn a side view the head and rostnun have a completely 

 independent curvature, not properly shown in the figures; the head is smooth, 

 excepting on the sides below the up])er margin of the eye, Avliere it is trans- 

 versely and very finely rugose, and on the posterior ])orti( )n, where it is faintly 

 and finely punctate, like the rostrum. The thorax is closely and more 

 coarsely punctate, and above faintly rugulose. The elytra, in none of the 



