228 



COLTJBEIDiB. 



a-c. d (V. 122; C. 31), $ San Bias. Hr. A. Forrer [C.]. 



(V. 126 ; 0. 27), & hgr. (V. 

 132; C.27). 



23. Homalocraninm gracile. 



Tantilla gracilis, Baird Sr Qir, Cat. N. Am. Mept. pp. 132, 161 

 (1853) ; HaUow. Proc. Ac. Philad. 1856, p. 246 ; Garm. N. Am. 

 Sept. p. 87, pi. vi. fig. 3 (1883) ; Cope, Proc. U.S. Nat. Mus. ziv. 

 1892, p. 598. 



hallowellii, Cope, Proc. Ac. Philad. 1860, p. 77. 



Homalocraninm gracile, Jan, Arch. Zool. Anat. Phys. ii. 1862, p. 50, 

 and Icon. Gin. 15, pi. ii. fig. 1 (1866) ; Bocourt, Miss. ISc. Mex., 

 Pept. p. 579, pi. xxxvi. fig. 5 (1883) ; Qiinth.. Biol. C.-Am., Sept. 

 p. 146 (1896). 



Eye not half as long as the snout, which is much depressed and 

 very prominent. Eostral large, a little broader than deep, the 

 portion visible from above nearly as long as its distance from the 

 frontal ; internasals at least half as long as the prsefrontals ; frontal 

 hexagonal, obtuse-angled in front, acute-angled behind, a little 

 longer than broad, as long as or longer than its distance from the 

 end of the snout, shorter than the parietals ; nostril in a single or 

 divided nasal, ■which is in contact with or narrowly separated from 

 the praeocular ; one postocular ; temporals 1-1-1, the first sometimes 

 narrowly separated from the postocular by the contact of the 

 parietal and the fifth labial ; six upper labials, third and fourth 

 entering the eye ; first lower labial usually separated from its fellow 

 by the symphysial ; four lower labials in contact with the anterior 

 chin-shields, which are longer than the posterior. Scales in 15 

 rows. Ventrals 112-133 ; anal divided ; subcaudals 41-51. Pale 

 brown or reddish above, uniform or speckled with dark brown, some- 

 times with a dark vertebral line ; upper surface of head darker brown ; 

 yellowish or orange below. 



Total length 195 millim. ; tail 44. 



Texas. 



a. S (V. 122; 0. ?) Texas. Smithsonian Institution. 



6, c, dr-g, hr-i. S (V. 116, 114, Duval Co., W. Taylor, Esq. [P.]. 



114, 115, 114, 112 ; C. 48, Texas. 



46, 47, 51, 49, P) & ? (V. 



117,126; O.P,43). 



185. OGMIUS. 



Ogmius, Cope, Proc. Amer. Philos. Soc. xi. 1869, p. 162, and Joum. 

 Ac. Philad. (2) viii. 1876, p. 142. 



Dentition as in StenorMna. Head small, not distinct from neck 

 eye smaU, with round pupil ; snout pointed and projecting ; nostril 

 in a single nasal ; no loreal. Scales smooth, in 17 rows ; ventrals 

 rounded. Tail short ; subcaudals in two rows. 



Mexico. ':- 



