CURCULIONIDA—CU RCULIONIN A—TYCHINI. 1 7T 
Length, excluding rostrum, 3°75""; rostrum, 0°85"; height of body, 
15R 
Florissant, Colorado. Six specimens, Nos. 483, 4357, 5430, 8522 and 
8908, 8957, and of the Princeton collection 1°609. 
SIBYNES Schonherr. 
A genus almost exclusively confined to the Old World, but of which a 
single species is known from California. Oustalet has described a fossil 
species from Aix, and one, which, however, bears no special resemblance to 
that, has been found at Florissant. It differs slightly in antennal structure 
from the living forms; as in these, the funiele is six-jointed, but the relation 
of the joints is a little different: the first joint is the longest, the second is 
somewhat shorter, much slenderer, expanding apically, twice as long as its 
apical breadth, and more than twice as long as the third joint; following 
the second are three precisely similar quadrate joints, scarcely broader than 
long, followed by a similar but a little broader sixth joint. 
SIBYNES WHITNEYI. 
Pl. v1, Figs. 15, 16. 
S 
Head well rounded, about twice as high as long, very finely and uni- 
formly punctulate, the eye of moderate size, transversely oval, a little pointed 
beneath, far removed from the thoracic margin; beak gently arcuate, con- 
tinuing the curve of the head and thorax, nearly as long as the head and 
prothorax together, slender and equal. Prothorax tapering regularly from 
the base, half as high again as long, with some signs of a lateral ruga, the 
surface rather densely and not very finely punctate. Under surface with 
similar but more distant punctuation. Elytra distinctly and rather heavily 
punctato-striate, the interspaces apparently smooth. 
Length, excluding rostrum, 3-4""; rostrum, 1"; height of body, 1-75™". 
Florissant, Colorado. Fifteen specimens, Nos. 1, 2667, 4544, 7486, 8844, 
8974, 9162, 10051, 11254, 11284, 11296, 12427, 13597, 13623 and 13679, 
13643. 
Named for the distinguished geologist, Prof. Josiah D. Whitney, of 
Cambridge. 
