OTIOUIIYNCIIID.E — I'll VLLOBIINI. 59 



arc aluiiist cxrUisivi'lv ctmtiiHMl tn (Jalit'i>ruia. 'I'lirce speries have heon 

 touiid in tlie Tertiaries of Green River, Wliite river, and Roan mountains, 

 one referred here with iiiuch doiiljt, l)iit none fron\ Florissant, so that it 

 Mia\ be reirarded as one of the cliaracteristie features of the Gosiute fauna. 

 The species placed here are known principally Ky their elytra only, 

 wliich ayree closely with those of oin- livini^- forms. The alxlniiii-ii is pre- 

 s»M-ve<i in an instance or two, and shows the third ami loiu'th sei^iiients not 

 more than togetlier eipial to the second, which is separated from the lirst l»y 

 an arcuate suture: the hind <dxa' are widely separated, and the interco.xal 

 iirocess is l)roadlv arcuate in i'ront; the abdomen is rather naiTow, narrow- 

 iu"- i)ostcriorlv, well rounded aiiicallv , and the middle coxae are naiTowlv 

 separated. 



Table of the species of Scythroptts. 



Piiiirf a (if elytra feebly impressed suhtcrrnnnis. 



I'liiiita of elytra deeply impressed, at lea.st in the basal half. 



Laifjcr species. Striae of elytra ciinall \- distant tliieimliont somniruloaii^^. 



Smaller s[)cuies. iStria- of elytra iiiucl vi' widely separated in the middle of 



the elytra than at the base aliacii.s. 



SCYTHKOPUS SUBTERRANEUS. 

 PI. IX. Fio-. 14. 



Single elytra only are known, excepting that a few stones show a pair 

 tninid together, in a coujde of instances sprea<l and accompanied liy the 

 alidomeii, and in another showing an u[)per view of head and thoi'ax. The 

 head is short and nearly concealed l)eneatli the thorax ; eyes small, oval, 

 transverse (in this respect not agreeing with living species); beak half as 

 IfMi"- as the prothorax, and .somewhat longer than broad, truncate with 

 rounded angles. Prothorax bullate, somewhat Ijroader than long, densely 

 and not very finely punctate, anteriorly constricted. Flytra from two and 

 a (piarter to two and a third times as long as broad, tapering lieyoud the 

 middle by the stroni:' inrvature of the outer margin, while the sutural 

 margin is straight, the humeial angle well rounded, the apex snbacuminate: 

 there are ten rather ilelicately punctate, .sliaritly impnssed stria, the inter- 



