472 TERTIARY INSECTS OF NORTH AMERICA. 



served, so that it is one of the most perfect of the Green River Coleoptera. 

 The small head, long and slender, straight, and drooping snout, the tapering 

 thorax, broad and short striate elytra, thickened femora, and long and 

 slender tibise leave little doubt that it should be referred to Gymnetron or to 

 its immediate vicinity. It is very nearly as large as G. teter Schonh., with 

 which it closely agrees in almost every part. The third tarsal joint is simi- 

 larly expanded. The real length of the rostrum can not be determined from 

 the position of the insect, but it is apparently as long as the head and thorax 

 together, is very nearly straight, slender, scarcely enlarged, and obliquely 

 docked at the tip ; only a portion of tlie antennal scrobes can be seen ; this 

 is in the middle of the beak, where the groove is narrow, deep, sharply 

 defined, and inclined slightly downward toward the base of the beak. The 

 thorax is subrugulose, and the surface of the elytra smooth, with distinct, 

 but not deeply impressed, very faintly punctured striae. The whole speci- 

 men is piceous. 



Length of body, S.IS""" ; of snout, !"■" (?) ; of head and thorax, 0.9""" ; 

 of thorax, 0.75"™; of elytra, 2.25"™; of bind tibia?, 1.5"™; distance apart 

 of elytral stria; 0.1"'°'. 



Green River, Wyoming. One specimen, Nos. 4030 and 4047. 



ANTHONOMUS Germar. 



Anthonomus sopokus. 

 PI. 8, Fig. 16. 



A single elytron is preserved, in excellent condition. It is, however, 

 completely flattened, bringing the apex, which is scarcely angulate, in the 

 middle. There are nine equidistant, rather coarse, not greatly (?levated 

 (perhaps partly flattened by pressure), coarsely beaded ridges (represent- 

 ing, by reversal, strise) besides the sutural ridge, the third and fourth from 

 the sutural being a little shorter than the others, which increase regularly 

 in length from within outward. The smooth, flat interspaces are fully 

 twice as broad as the strise. 



Length of elytron, 2"™ ; breadth, O.O""". 



The elytron difi'ers from that of A. defossus previously described from 

 the Florissant Tertiaries in its greater size and apparently greater slender- 



