94 UNIVERSITY OF COLORADO STUDIES 



one-fourth of the total length; size large, body heavy, length often 

 eight feet (specimens exceeding nine feet in length have been recorded). 

 Ground color yellowish gray, or yellowish or reddish brown, often 

 bright yellow or even orange yellow; ventral parts lighter, with an 

 irregular row of dark blotches near the lateral margins of the ventrals; 

 dorsal pattern consisting of a row of rather large, somewhat rectangu- 

 lar, brown, reddish brown or black spots, occupying the mid-dorsal 

 region, these spots often more or less confluent near the head, forming 

 a dark mid-dorsal stripe in which are small spots of the yellowish 

 ground color; between the dorsal row of spots and the ventrals on 

 each side a row of smaller more indistinct spots of a lighter shade than 

 the dorsal spots; head yellowish, with or without a dark stripe from 

 the eye to the posterior angle of the mouth. Mr. L. J. Hersey reports 

 this species from Barr, Colo., as eating the eggs of the Pin Tail Duck, 

 in the summer of 1906. 



Colorado specimens. — University Museum: Boulder, May 10, 191 1 

 (700 mm.), No. 77; Boulder, October 9, 1911 (410 mm.), B. Rowland, No. 145; 

 Colorado State Historical and Natural History Museum: Denver, May 14, 1903 

 (635 mm.), W. C. Ferril; Colorado, 1896 (1550 mm.); Denver, June 12, 1903 

 (970 mm.), H. G. Smith; Wray, May 31, 1905 (1130 mm.), H. G. Smith; Jules- 

 burg, May 1, 1906 (1040 mm.), W. C. Ferril; Agricultural College Museum: 

 Ft. Collins, July, 1892 (1280 mm.), C. P. Gillette; State Teachers' College Museum: 

 Las Animas and Baca counties, A. E. Beardsley; reported by Henderson from foot- 

 hills five miles south of Box Elder, Larimer County, 1905; from Osgood, June 23, 

 1912; from Wild Cat Creek, northeast of Ft. Morgan; by Cockerell, from Boulder, 

 May 22, 1907, as variety, P. c. sayi. 



Pityophis catenifer bellona (Baird and Girard) 



Pituophis bellona Baird and Girard, Cat. N. Am. Rept., Pt. I, p. 66, 1853. 



Pityophis catenifer bellona Brown, Proc. Acad. Nat. Sci. Phila., Vol. LIII, 

 p. 54. 1901. 



Pityophis sayi bellona — Yarrow, Wheeler Survey, Vol. V, pp. 515 and 541, 

 1875 (Pagosa, Colo.); Yarrow, U.S.N.M. Bull. 24, pp. 106-107, 1882 (Pagosa, 

 Cal., probably an error for Col.); Cope, Rept. U.S.N.M., p. 876, 1898 (Pagosa, 

 Colo.). 



Colorado specimen. — State Teachers' College Museum: Fruita, A. E. 

 Beardsley. 



