10. TKOPIBOlfOTTrS. 245 



five longitudinal alternating series of blackish spots ; lower parts 

 dark brown spotted with yellow, or yellow spotted with brown. 



Total length 930 millim. ; tail 220. 



United States east of the Mississippi, as far north as Ohio. 



a. 2 (Sc. 29; V. 138; 0. 64). New Orleans. 



6. Yg-.(Sc.29; V. 132;0.79). Lake Kerr, Florida. A. Er win Brown, 



Esq. [P.]. 

 t;. Yg. (Sc.31;V.136; 0. 73). Florida. Smithsonian In- 



d. ? (Sc. 29; V. 137; 0. 69). United States. 



stitution [P.]. 



47. Tropidonotus taxispilotus. 



Tropidonotus taxispilotus, Holbr. N. Am. "Hei-p. iv. p. 35, pi. viii. 



(1842) ; Bum. ^ Bihr. vii. p. 605 (1854) ; Jan, Arch. Zool. Anat. 



Phys. iii. 1866, p. 222, aiid Icon. Qki. 26, pi. v. fig. 1 (1868) ; 



Qarm. N. Am. Sept. p. 26 (1883). 

 Nerodia taxispilota, Saird ^ Oir. Cat. N. Am. Sept. p. 43 (1853). 

 Tropidonotus taxispilotus, var. brocH, Heilprin, Explor. Florida, 



p. 129, pi. xvii. (1887). 

 Natrix taxispilota. Cope, Proc. U.S. Nat. Mua. xi. 1889, p. 392. 



Head small ; eye rather small. Eostral broader than deep, 

 visible from above ; internasals narrow, as long as or a little shorter 

 than the prsefrontals ; frontal once and a half to once and three 

 fourths as long as broad, nearly as long as its distance from the end 

 of the snout ; parietals very short, broken up into scales posteriorly ; 

 loreal longer than deep ; one prse- and two postoculars ; temporals 

 2+4 or 5 (or 1+3) ; eight upper labials, fourth entering the eye ; 

 five or six lower labials in contact with the anterior chin- shields, 

 which are nearly as long as the posterior. Scales in 29 to 33 rows, 

 strongly keeled, outer row more or less distinctly keeled. Ventrals 

 130-144 ; anal divided ; subcaudals 70-83. Brown above, with 

 three alternating series of large quadrangular dark brown spots ; 

 lower parts whitish, spotted or marbled with brown, the brown 

 colour usually predominating. 



Total length 1310 millim. ; tail 300. 



Eastern United States from New York to Florida. 



a-h. $ (Sc. 31 ; V. 139 ; 0. 73), N. America. Lord AmpthUl [P.]. 



& yg. (Sc. 31 ; V. 139 ; 0. 83). 



c-d. 5 (Sc. 31, 31 ; V. 186, 136 ; Savannah, Paris Museum [P.]. 



0. 70, ?). Georgia. 



III. Amphiesma. — Maxillary teeth not more than 30, last two or 

 three abruptly enlarged. 



Maxillary of Tropidonotus tigriims. 



