288 COLUBRID. 
Rostral broader than deep, visible from above; nasal divided or 
semidivided, in contact with the preoculars; internasals broader 
than long, shorter than the preefrontals; frontal about once and a 
half as long as broad, longer than its distance from the end of the 
snout, shorter than the parietals; two pre- and two postoculars ; 
temporals 142; six upper labials, third and fourth entering the 
eye; four lower labials in contact with the anterior chin-shields ; 
posterior chin-shields shorter than the anterior and in contact with 
each other. Scales in 15 rows, all keeled. Ventrals 110-128 ; 
anal divided; subcaudals 38-52. Olive-brown above, usually with 
a lighter vertebral stripe bordered by two series of dark dots or by 
two dark brown lines; a more or less distinct dark lateral line, 
below which the sides and the outer ends of the ventrals are speckled 
or vermiculate with black; three yellow spots behind the shielded 
part of the head; belly yellowish or coral-red in the middle. 
Total length 320 millim. ; tail 60. 
Canada and United States, east of the Rocky Mountains. 
a. Hgr. (V. 125; C. 38). Nova Scotia. J. M. Jones, Esq. [P.]- 
b-d, e, f. 2 (V. 125, 127, 128; N. America. 
C. 39, 42, 43) & hgr. (V. 119, 
110; C. 50, 50). 
4, Ischnognathus storerioides. 
Tropidoclonium storerioides, Cope, Proc. Ac. Philad. 1865, p. 190. 
Storeria storerioides, Garm. N. Am. Rept. p. 29 (1883). 
Natrix storerioides, Cope, Proc. US. Nat. Mus. xi. 1889, p. 391. 
Rostral just visible from above ; nasal semidivided or completely 
divided ; loreal present, sometimes entering the eye; internasals 
broader than long, shorter than the prefrontals; frontal once and 
a half as long as broad, a little longer than its distance from the 
end of the snout, shorter than the parietals; two pre- and two or 
three postoculars; temporals 14+2; six or seven upper Jabials, 
third and fourth entering the eye; three or four lower labials in 
contact with the anterior chin-shields ; posterior chin-shields sepa- 
rated from each other or in contact anteriorly. Scales in 15 rows, 
outer row smooth. Ventrals 120-135; anal divided; subcaudals 
37-51. Olive-brown, reddish or blackish above, with small black 
spots; vertebral region occasionally somewhat lighter and crossed 
by narrow black lines; a blackish blotch, bifid posteriorly, on the 
back of the head; grey or reddish beneath, sides usually speckled 
with black. 
Total length 340 millim.; tail 65. 
Mexico, 
a. 9 (V. 129; C: 41). Plateau of Mexico. Mr. Doorman [P.}. 
b-c, d-i. § (V. 128, 183; La Cumbe de los Arra- Dr. A. C. Buller 
C. 42, 45), 9 (V. 130, _ strados, Talpa, Jalis- —[C.]. 
133, 134, 130, 131; C. co, 8500 ft. 
41, 38, 38, 41, 38), & 
yg. (V. 185; C. 40). 
oo an 
