10. TROPIDONOTUS. 243 
Nerodia 4 Or oe a. Le. p. 40. 
— wooded Bid ir ia a 
— at r.le, wet 
a seen G Gir Loo 1a?. 
—— rhombifer, Baird § Gir. 1. c. p. 147. 
—— transversa, Baird § Gir. Le. Spee 
on nias, Dum. § B . 574. 
—— obliqu allow. Proc. Ac. Philad. 856, p- 248; Garm, Bull. 
Essex Seah” xxiv. cers eye 
—— cyclopion, part., Giinth 
Mecudia ctvakd, Keeniout reds Po Philad. 1860, p. 335. [ 
Tropidonotus couchii, Cope, Proc. Ac. Philad. 1860, p. 342. 
— woodhousii, Cope, 1. c.; Jan, ll. cc. p. 222, pl iv. fig. 1, 
—— bisectus, Cope, Proc. U.S. Nat. pr x. 1887, p. 146. 
Natrix fasciata, Cope, Proc. U.S. Nat. Mus. xi. 1588, p. 392, and 
xiv. -Pearedhe 
— bisecta, Cope, Proc. U.S. Nat. Mus. xiv. 1892, p. 670, 
—— fasciata pleuralis, Cope, /. c. p. 672. 
—— rhombifera, Cope, /. c. p. 673. 
Eye rather small. Rostral broader than deep, visible from above ; 
internasals much narrowed in front, as long as broad or a little 
longer, as long as or shorter than the prefrontals ; 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 as long as 
deep or deeper ; one (rarely two) pr- said three (rarely two) post- 
oculars ; temporals 14+2 or 1+3; eight upper labials, fourth or 
fourth and fifth entering the eye; five (rarely four) lower labials in 
contact with the anterior chin-shields, which are shorter than the 
posterior. Scales in 23 to 27 rows, strongly keeled, of outer row 
more or less distinctly keeled. Ventrals 128-154; anal divided ; 
_ Total length 1100 millim; tail 240. 
North America east of the Rocky Mountains ; Central America, 
A. (Forma typica.) Brown above, with a dorsal row of large trans- 
verse blackish spots and an alternating series of smaller spots 
on each side, or with dark brown cross bands ; belly sotted 
with black or brown. Scales in 23 or 25 rows. 
a. § (Sc. 23; V. 143; 0.75). Canada. 7, Creitenanta Esq. 
b. 2 (Se. 23; V. 146; 0. 65). Canada. Ofcact he Chatham 
e-d. Yg. (Se. 25; V. 136, Bloomington, ©. Bo C. 
st Ga eon 36, eee "Bollman; Eg. [ } 
e. Hgr. (Sc. 25; V.130; C.?), Florida. ae “4 
fg, Her. (Se. 285 V,. 182 New Orleans. 
C. 72) oe (Se. 23 
ee Ye (86. e638 V. 149, New Orleans, M. Sallé (C.}, 
a 2 
B 
