94 TERTIARY RHYNCHOPHOROUS COLEOPTERA. 
similar; fourth elongated and slender, enlarging apically as usual. Fore 
coxe contiguous. Second abdominal segment as long as the third and fourth 
together, separated from the first by a straight suture. 
The single known species of this genus comes from Florissant, and 
closely resembles in general appearance the large fossil Cleonus, C. exterra- 
neus, from the same beds. 
LaccopyGus NILES. 
Pl Mige doy is, 
Head smooth; rostrum finely and closely punctate. Prothorax finely 
and closely rugoso-scabrous, pretty uniform over the whole surface.  Strize 
of abdomen with pretty sharp and deep, more or less longitudinal and con- 
fluent puncta, the interspaces nearly smooth and flat. 
Length, 11™"; breadth at base of elytra, 425™"; length of elytra, 6-5"; 
scape of antennee, 2”; funicle, 3™™. 
Florissant, Colorado. One specimen, Nos. 6386 and 6387. 
Named for my good friend, the geologist, Prof. W. H. Niles, of the 
Massachusetts Institute of Technology. 
Tribe CLEONINI. 
This is one of the most important tribes of Curculioninz in the 
European Tertiaries, no less than half a dozen genera with twenty-two 
species being recognized, and, at Oeningen at least, the species are abun- 
dant in individuals. These genera are Rhinobatus, recognized at Aix by 
Hope and Serres; Lixus, with two species, at Oeningen; Rhinocyllus, with 
one species, at Rott; Cleonus, with fourteen species (the largest number 
referred to any one genus of Curculionide, or, indeed, of Rhynchophora, 
excepting the magazine genus Curculionites), from Oeningen (6), Corent 
(2), Aix (6), and Brunstatt (one species found also at Aix). It is a far less 
important ingredient of the Tertiary fauna of North America, and is con- 
fined to Florissant, where five species occur, all but one also referred to 
Cleonus, the exception being distinguished as an extinct generic type under 
the name of Eocleonus. 
