238 COLTTBEID^. 



tudinal series of small blackish spots; lower parts uniform 

 yellowish. 



Total length 810 millim. ; tail 190. 



Mexico ; Lower California ; Arizona and Utah. 



a-g, h, i. S (V. 138 ; C. ?), Presidio, W. Mexico. Mr. A. Forrer [0.]. 

 $ (V. 144, 143, 141, 142, 

 142, 139 ; 0. 70, 77, 68, 

 69, ?, 68), & bffr. (V. 136, 

 143 ; 0. 76, 66). 



38. Tropidonotus clarMi. 



Tropidonotus fasciatus, part., Schkg. Pkys. Serp. ii. p. 323 (1837). 

 Regina clarkii, Baird k Gir. Cat. N. Am. Rept. p. 48 (1853). 

 ■ Tropidonotus fasciatus, var. iv.. Bum. Sf Bibr. vii. p. 573 (1854). 



• medusa, Gunth. Cat. p. 78 (1868). 



clarkii, Cope, Proc. Ac. Philad. 1861, p. 74; Jan, Arch. Zool. 



Anat. Phys. iii. 1865, p. 231, and Icon. Gen. 27, pi. vi. fig. 1 (1868) ; 

 A. K. Fisher, Am. Nat. 1887, p. 672. 



ornatus, Jan, I. c. p. 218. 



liberis, var. clarkii, Qarm. N. Am. Rept. p. 142 (1883). 



Natrix clarkii, Cope, Proc. U.S. Nat. Mus. xiv. 1892, p. 669. 



Eye rather small. Rostral broader than deep, visible from 

 above ; nasal usually semidivided ; iuternasals much narrowed in 

 front, as long as broad or longer, as long as or a little shorter than 

 the prsefrontals ; frontal once and two thirds to twice as long as 

 broad, as long as its distance from the end of the snout, shorter 

 than the parietals ; loreal longer than deep ; one prse- and two or 

 three postoculars ; temporals 1 + 3 ; eight upper labials, fourth and 

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

 anterior chin-shields, which are shorter than the posterior. Scales 

 in 21 rows, strongly keeled, outer row distinctly keeled. Ventrals 

 129-132 ; anal divided ; subcaudals 57-70. Dark brown or 

 blackish olive above, with three yellowish stripes ; blackish or 

 reddish brown inferiorly, with a yellow lateral stripe and a median 

 series of yellow triangular spots, which may be confluent into a 

 stripe. 



Total length 830 millim. ; tail 190. 



Florida, Louisiana, Texas. 



a. $ (V. 131 ; 0. 65). Pensacola, Florida. 0. BoUman, Esq. [0.]. 

 I Ig^Tv! 13i ;%'?)•. NTmerica. | (^^P- of T. medusa.) 



39. Tropidonotus compressicauda. 



Nerodia compressicauda, Kennkott, Proc. Ac. Philad. 1860, p. 335. 

 Tropidonotus ustus, Cope, Proa. Ac. Philad. 1860, p. 340. 



compsolsemus. Cope, I. c. p. 368. 



compressicaudus, Cope, Proc. Ac. Philad. 1861 , p. 74 ; Garm. 



N. Am. Rept. p. 27 (1883). _ 

 compressicaudus walkeri, Yairoiv, Proc. U.S. Nat. Mus. vi. 



1883, p. 154. 



