60. COLUBER. 69 



Sum. a. Miss. R. x. pi. xxix. fig. 44 (1859) ; Jan, Icon. Gen. 22, pi. i. 



fig. 2 (1867) ; Garm. N. Am. Rept. p. 51 (1883) ; Bocourt, Miss. 



Sc. Mex., Rept. pi. xlvii. fig. 5 (1888) ; Giinth. Biol. C.-Am., 



Rept. p. J2o (1894). 

 Churcliillia belloua, Baird ^ Gir. in Stanshurif s Expl. Great Salt 



Lake, p. 350 (1852). 

 Pituopbis aifinis, Hallow. Proc. Ac. Philad. 1852, p. 181. 

 belloua, Baird ^- Gir. I. c. p. (56, and Rep. B.cplor. Surv. R. 



Miss. R. X. pi. xxix. fig. 46 ; Bocourt, I. c. fig. 2. 



macclullaiiii, Bdirdh,- Gir. II. cc. p. 68, tig. 47. 



mexicanus, iJiun. ^- Bibr. vii. p. 236, pi. Ixii. ; Giinth. Cat. 



p. 88 ; Bocourt, I. c. p. 674, pis. xlii. fig. 4 & xlvii. fig. 6. 

 sayi, Baird, Explor. Surv. R. Miss. R. x. pi. xxi.x. fig. 45 ; Cojjc, 



Proc. U.S. Nat. Mus. siv. 1892, p. 640. 

 Pityopbis catenifer, var. sayi, H. Garm. Bull. Illin. Lab. iii. 1892, 



p. 288. 



Snout projecting; rostral much deeper than broad, the portion 

 visible from above measuring one half to two thirds its distance 

 from the frontal ; praefrontals broken up into four shields or more ; 

 frontal once and one third to once and two thirds as long as broad, 

 as long as or a little longer than its distance from the rostral ; 

 parietals usually broken up behind : loreal longer than deep ; one 

 large prtEocular, sometimes with a small subocular below it ; two or 

 three postoculars and one or two posterior suboculars ; temporals 

 3 or 4 + 4 or 5 ; eight or nine upper labials, fourth or fifth 

 entering the eye ; five or six lower labials in contact with the 

 anterior chin-shields, which are much longer than the posterior. 

 Scales in 29 to 35 rows, dorsals strongly keeled. Yeutrals !^09-239 ; 

 anal entire ; subcaudals 45-65. Yellowish or pale brown above ; 

 a dorsal series of large squarish, brown, black-edged spots ; sides with 

 small spots ; young with a dark band across tbe forehead, from eye 

 to eye, and another from the eye to the angle of the mouth ; some 

 or all of the labials with black sutures ; yellowish white inferiorlj', 

 usually with brown spots. 



Total length 1480 millim. ; tail 190. 



North America and ilexico. 



a, b, c. S (Sc. 31, 29, 29 ; Brit. Columbia. J. K. Lord, Esq. [P.]. 

 V. 218, 216, 215; C.61, 

 62, 62). 



d. 2 (Sc. 31; V. 220; Medicine Hat, Assi- Prof. C. Eigenmaun 

 0. 53). niboia. [0.]. 



e. 2 (Sc. 31 ; V. 221 ; Nebraska. Smithsonian Instit. 

 C. 52). [P.]. 



/. 2 (Sc. 31; V. 229; New Mexico. Smithsouian Instit. 



C. 5(5). [P.]. 



ff, h. 2 (Sc. .35, 35 ; V. Duval Co., Texas. W. Taylor, Esq. [CI. 



230, 237 ; C. 47, 47). 

 i. cJ (Sc. 33; V. 230; Nuevo Leon. W. Tajdor, Esq. fC.l 



C. 45). 

 k,l. S (Sc. 31; V. 215; N.America. 



C. 57) & 2 (Sc. 33; 



V. 224 ; C. 52). 



