10. TROPIDONOTUS. 239 



Natrix usta, Cope, Proc. U.S. Nat. Mm. xi. 1889, p. 392. 



compressicauda, Cope, I. c, and xiv, 1892, p. 609. 



compressicauda bivittata, Cb/Je, ll. cc. 



Allied to T. valldus and T. chtrldl. Frontal shield broad ; loreal 

 longer than deoj) ; one pra5- and two or tlirec postoculars : a single 

 anterior temporal ; eight up])er labials, fourth and filth entering 

 the eye. Scales in 19 or 21 rows, strongly keeled, outer row feebly 

 keeled. Ventrals 126-137 ; anal divided ; subcaudals 66-81. Tail 

 compressed at the base. Dark greyish brown above, much spotted 

 and dotted with yellowish, or with blackish markings ; belly brown 

 or red, with yellow spots, or yellow with two lines of black blotches. 



Florida. 



40. Tropidonotus septemvittatus. 



Coluber septemvittatus, Saij, Journ. Ac. Philad. iv. 1825, p. 240: 

 Harl. Med. Phys. Res. p. 118 (1835). 



Tropidonotus leberis, Holbr. N. Am. lierp. iv. p. 49, pi. xiii. (1842) ; 

 Bekay, N. Y. P\mn., Rept. p. 45, pi. xi. fig. 23 (1842) ; bum. (S- 

 Bibr. vii. p. 579 (1854) ; Gilnth. Cat. y. 78 (185>!) ; Jayi, Arch. 



2 



Kegina leberis, Baird 8f Gir. Cat. N.Am. Z^e;;^. p. 45 (1853) ; H. 



Garm. Bull, lllin. Lab. iii. 1892, p. 272. 

 Natrix leberis, Cope, Proc. U.S. Nat. Mus. xiv. 1892, p. 668. 



Head small, scarcely distinct from neck. Eye rather small. 

 Rostral broader than deep, visible from above ; nasal scmidivided ; 

 internasals small, as long as broad, as long as or a little shorter than 

 the prtefrontals ; frontal hardly once and a half as long as broad, as 

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

 shorter than the parietals ; loreal as long as deep or a little longer ; 

 two prae- and two postoculars ; temporals 1 + 2 ; seven upper labials, 

 third and fourth entering the eye ; five lower labials in contact 

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

 Scales in 11) rows, all strongly keeled. Ventrals 140-151 ; anal 

 divided ; subcaudals 64-86. Olive-brown above, with or without 

 three darker dorsal stripes ; a yellowish lateral streak along the 

 first and second rows of scales ; upjicr lip yellowish ; belly yellowish, 

 with, four brown stripes, the two median of which may be broken 

 up into spots. 



Total length 690 millira. ; tail 160. 



United States east of the Mississippi and Texas. 



a-b. llgr. (S (V. 143; C. 77) Bloomington, Indiana. C. Bollman, Esq. 



& 2 (V. 146 ; C. 67). [C.]. 



c-ff. d (V. 140, 146, 145 ; C. N. America. 



79, 73, ?), $ (V. 151 ; C. 



73), & yg. (V. 141 ; C. 67). 



