434 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



mens collected by Dr. W. P. Taylor and myself at Quinn Kiver Cross- 

 ing and the vicinity of Pine Forest Mountains, and others taken by 

 Miss Alexander and Miss Kellogg in Virgin Valley, Humboldt County 

 (see Taylor, 1912, pp. 355-356), probably represent the same form 

 which inhabits the Pyramid Lake region. 



Description and status. — One anterior and one posterior nasal, 

 internasals irregular in six rows; preoculars 2-2; scales in contact with 

 eye between preoculars and supraoculars 5-6; supraoculars 1-1; 

 a large scale in front of the supraocular on each side; scale rows 

 between supraocular plates 8; supralabials 15-17; infralabials 16-17; 

 dorsal scale rows just back of the head 27; maximum number on 

 trunk 25, first row on each side unkeeled, second with obsolete 

 keels; ventrals 180; subcaudals 25, the distal two divided; total 

 length (exclusive of rattle), 968; tail length (without rattle), 71. 



Color (alcoholic specimen). — Above light brown with numerous 

 brownish black ocelli surrounding a darker ground color. On the 

 posterior part of the body these ocelli become constricted to form 

 transverse bands, those near the tip of the tail becoming irregular. 

 Ventral surface dull white with a gray suffusion, generally heaviest 

 on the outer anterior edge of each ventral scale and more pronounced 

 toward the posterior part of the body. 



I follow Van Denburgh in referring the Crotalus of this region to 

 oregonus Holbrook. (See Van Denburgh, 1912.) 



Habits. — This individual was found among volcanic bowlders on a 

 hillside. Its stomach contained an adult ground squirrel, Oitellus 

 mollis. 



LITERATURE CITED. 



Baird, Spencer F., and Girard, Charles. 



1852. Characteristics of some new reptiles in the museum of the Smithsonian 

 Institution. Proc. Acad. Nat. Sci. Phila., pp. 68-70. 

 Cope, E. D. 



1883. Notes on the geographical distribution of batrachia and reptilia in western 



North America. Proc. Acad. Nat. Sci. Phila., pp. 10-35. 

 1898. The crocodilians, lizards, and snakes of North America. Rept. U. S. Nat. 

 Mus., pp. 153-1294 (pis. 1-36, text figs. 347). 

 Meek, Seth Eugene. 



1905. An annotated list of a collection of reptiles from southern California and 

 northern lower California. Field Columbian Museum, Publication 104, 

 Zoological series, vol. 7, No. 1, pp. 3-19, pis. 1-3. 

 Ruthven, A. G. 



1907. A collection of reptiles and amphibians from southern New Mexico and 



Arizona. Bull. Amer. Mus. Nat. Hist., vol. 23, pp. 483-603 (figs. 1-22). 



1908. Variations and genetic relationships of the gartersnakes. U. S. Nat. Mus. 



Bull. 61, pp. 1-201, 1 pi., 82 text figs. 

 1913. Description of a new Uta from Nevada. Proc. Biol. Soc. Washington, 

 vol. 24, pp. 27-30, 1 text fig. 



