OPHIDIA CROTALIDAE CROTALUS LUCIFER. 529 



foot is that of E. montesumce and E. catesbiana. It is also quite similar to 

 the variety of E. tcmporaria from California, called E. draytonii by Baird 

 and Girard, and E. longipes by Hallowell. The feet are shorter, the hind 

 foot being twice as long as the head to the posterior border of the tympanum, 

 while in E. t. draytonii it is 2.5 times as long. The E. onca lacks the black 

 cheek-patch of the E. tcmporaria. 



Specimen secured in 1872 in Utah by Dr. H. C. Yarrow. 



The plate affords view of dorsum and month of this species. 



OPHIDIA. 

 SOLENOGLYPHA. 



FAM. CROTALIDAE 



Genus CROTALUS, Linn. 



GROTALD8 ADAMANTEUS, Beauvois, subspecies ATROX, Baird & Girard. 



Crotalus atrox, BAIRD & GIRARD, Cat. ST.. A. Kept., pt. i, Serp., 1853, 5-150. BD. P. R. 



R. Rep., x, 1859, 39. Id., U. S. & Hex. Bound. Surv., ii, Kept., 1859, 14. 

 Caudlsona atrox, COPE, Mitchell's Res., 1861, 121. Id., Proc. Acad. Nat. Sei. Pbila., 



I860, 309. 

 Crotahts adamanteus, subspecies atrox, COPE, Check-List N. A. Batrach. & Kept., 1875, 33. 



HAB. Indian Territory and Texas to Souora and Southern and Lower California. 

 Rather uncommon. 



CHOTALDS LUCIFER, Baird & Girard. 



Crotalus liwifer, BAIRD & GIRARD, Proc. Acad. Nat. Sci. Phila., vi, 1852, 171. Id., 



Cat. N. A. Rept., pt. i, Serp., 1853, 6. GIRARD, Herp., U. S. Exp. Exped., 



1858, 187. BD., P. R, R. Rep., x, 1859, 10. COOP. & SUCKL., Nat. Hist. \V;ish. 



Terr.. 1860, 1860, 295. COPE, Check-List N. A. Batrach. & Rept,, 1875, 33. 



34 z 



