318 COLUBRIDE. 
than broad, longer than its distance from the end of the snout, 
shorter than the parietals; a narrow supraocular; loreal nearly 
twice as long as deep; one postocular; six upper labials, third and 
fourth entering the eye; four lower labials in contact with the 
anterior chin-shields, which are longer than the posterior and 
separated from the symphysial. Scales smooth, in 15 rows. Ven- 
trals 176; anal entire; subcaudals 44. Black above, with widely 
separated yellowish cross bars ; lower parts uniform yellowish. 
Total length 220 millim. ; tail 40. 
Tangancienaro, Mexico. 
5. Geophis sallei. (Prare XVI. fig. 1.) 
Geophis chalybea, part., Giinth. Biol. C-Am., Rept. p. 87 (1895). 
Maxillary extending a little beyond the palatine in front, the 
first tooth corresponding to the suture between the second and 
third labial shields. Eye very small, measuring two thirds to three 
fourths its distance from the mouth. Snout rounded, feebly pro- 
jecting. Rostral moderate, a little broader than deep, the portion 
visible from above measuring one fourth to one third its distance 
from the frontal; internasals much broader than long, one fifth to 
one fourth the length of the preefrontals, which are longer than 
broad; frontal as long as broad or slightly broader than long, as 
long as its distance from the end of the snout, shorter than the 
parietals; a very small supraocular; loreal twice to twice and a 
half as long as deep; one postocular; six upper labials, third and 
fourth entering the eye; three or four lower labials in contact with 
the anterior chin-shields, which are as long as ora little longer than 
the posterior and separated from the symphysial. Scales in 15 
rows, smooth on the nape, finely striated and feebly but very 
distinctly keeled on the body and base of tail. Ventrals 129-133; 
anal entire; subcaudals 30-41. Blackish brown above, scales of 
outer row lighter in the centre; belly uniform yellowish white ; 
subcaudals edged with brown. 
Total length 300 millim. ; tail 55. 
Mexico. 
a, b-c. § (V. 129; ©. 41) Mexico. M. Sallé [C.]. 
& 9 (V. 183, 181; C. 
36, 30). 
6. Geophis chalybeus. 
Catostoma chalybeum, Wagl. Syst. Amph. p. 194 (1880). 
Geophis chalybeus, Peters, Mon. Berl. Ac. 1859, p. 275; Bocourt, 
Miss. Sc. Mex., Rept. p. 550, pl. xxxi. fig. 11 (1883). 
Elapoides sieboldi, Jan, Arch. Zool. Anat. Phys. ii. 1862, p. 21, and 
Icon. Gén. 12, pl. i. fig. 4 (1865). 
Catostoma nasale, Cope, Proc. Ac. Philad. 1868, p. 131, fig. 
Ninia sieboldii, Garm. N. Am. Rept. p. 96 (1883). 
Rhabdosoma nasale, Cope, Proc. Amer. Philos. Soc. xxii. 1885, 
p. 385. 
