472 TERTIARY INSECTS OF ^OETH AMERICA. 



- rd. so that it is one of the most perfect of the Green River Coleoptera. 



. -.ender. straight, and drooping snont. the tapering 



thorax, broad ; - rt striate elytra, thickened femora, and long and 

 sler. ibt that it should be referred to Gymnetron or to 



[t is very nearly as large as G. teter Schonh.. with 



which I: . - _ .Imost every part. The third tarsal joint is simi- 



larly expanded. T _T!I of the rostrum can not be determined from 



sitioi : - et. but it is apparently as long as the head and thorax 



togel - _ .:t. slender, scarcelv enlarged, and obliquelv 



docked at the rip : f the antennal scrobes can be seen : this 



.e of t- the groove is narrow, deep, sharplv 



denned, 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 strife. The whole speci- 

 men is piceous. 



Length of body. 3.1 5= : of snout. 1= (?) : of head and thorax. 0.9 ; 

 of thorax. O.To^ : of elytra. '2.~2b : of hind tibia?. 1.5^ : distance apart 

 of elytral stria? 0.1 s *. 



Green River. Wyoming. One specimen. Xos. 4030 and 4047. 



AXTHOXOMUS Germar. 



AXTHOSOMTS SOPOErS. 

 PL S. Fig. 16. 



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

 completelv flattened, brinsinor the apex, which is scarcelv annulate, in the 



f - - 



middle. There are nine equidistant, rather coarse, not greatly elevated 

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

 ing, bv reversal, stria? t besides the sntural ridge, the third and fourth from 

 the sumral 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 stria?. 



Length of elytron. 2 : breadth. 0.9". 



The elytron differs from that of A. defossus previouslv described from 

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



