54. zAMENia. 391 



Masticophis tasuiatus, Baird 8f Qir. Cat. N. Am. Rept. p. 103 (1853), 

 . and JRep.Exphr. Surv. R. R. x., Rept. pi. xxiii. (1859) ; Jan, Icon. 



GSn. 22, pi. V. (1867). 



ornatus, Baird Sr Gir. I. c, pp. 102, 159. 



schotti, Baird 8f Gir. I. c. p. 1(30. 



LeptopMs lateralis, Halloio. Proc. Ac. Philad. 1853, p. 237, and 



Rep. Explor. Surv. R. R. x., Rept. p. 13, pi. iv. fig. 3 (,1859). 

 Herpetodrjas flavigularis, part., Giinth. Cat. p. 118 (1858). 

 Drymobius tseniatus, Cope, Proc. Ac. Philad. 1860, p. 561. 



aurigulus, Cope, Proc. Ac. Philad. 1861, p. 301. 



Masticophis bilineatus, Jan, I. c. pi. vi. fig. 2. 



Bascanium tseniatum. Cope, Check-List N. Am. Rept. p. 40 (1875) ; 



Bocourt, Miss. Sc. Mex., Rept. p. 703, pi. xlv. fig. 5, & xlviii. fig. 8 



(,1890) ; Cope, Proc. U.S. Nat. Mus. xiv. 1892, p. 629. 



aurigulum, Cope, I. c. 



tseniatum laterale, Yarrow, Wkeeier's Rep. v. p. 543 (1875). 



Coluber tseniatus, Gartnan, N. Am. Rept. p. 46 (1883). 



Bascanium laterale, Bocourt, I. c. p. 706, pi. xlviii. fig. 6 ; Cope, Proc. 



U.S. Nat. Mus. xiv. 1892, p. 628. 



semilineatum, Cope, /. c. p. 626. 



schottii, Cope, I. c. p. 629. 



ornatum, Cope, I. c. p. 629. 



Snout rather ■ prominent. Rostral nearly as deep as broad, the 

 portion visible from above not quite half as long as its distance from 

 the frontal ; internasals as long as or shorter than the prsefrontals ; 

 frontal not or but slightly broader than the supraocular, once and a 

 half to once and three fourths as long as broad, as long as or a little 

 longer than its distance from the end of the snout, as long as or 

 slightly shorter than the parietals ; loreal longer than deep ; one 

 praeocular, with a subocular below it ; two postoeulars ; temporals 

 2 + 2 ; eight upper labials, fourth and fifth entering the eye ; four 

 or fi.ve lower labials in contact with the anterior chin -shields ; 

 posterior chin-shields longer than the anterior, and separated from 

 each other by scales. Scales smooth, in 15 or 17 rows. Ventrals 

 very obtusely angulate laterally, 196-209 ; anal entire or divided ; 

 subcaudals 115-157. Brown or blackish above, striped with lighter. 



Total length 1330 miUim. ; tail 410. 



Southern United States, west of the Mississippi ; Northern 

 Mexico. 



A. Sides with black or reddish-brown and yellow longitudinal lines ; 

 belly uniform yellow. (£. tceniata, Hallow.) 



a. (J (Sc. 17; V. 199 ; C. 132). N. America. 



b. (S (Sc. 17; V. 196; 0. 134). Presidio, Mexico. Mr. A. Forrer [0.]. 



B. Sides with black and yellow longitudinal lines ; belly mottled with 

 grey, with a yellowish stripe on each side. (M. ornatus, B. & G.) 



c. Ad., skin (Sc. 15 ; V. 203 ; Coahuila, Mexico. W. Taylor, Esq. 

 C. 141). [0.]. 



