18. ISCHNOGNATHXrS. 289 



A-/, c^ (V. 126; C. 46) .fe Colonia Brizuela, Had- Dr. A. C. Buller 



2 (V, 130 ; 0. ;J7). enda el Rosario, Aut- [C.]. 

 Ian, Jalisco. 



m-o. c? (V. 127, 133, 120 ; Hacienda StaGertmdio, Dr. A. C. Buller 



C. 51, 47, 48). Mascota, Jalisco. [C.]. 



5. Ischnognathus copii. 



Adelophis copei [Duyhs), Cope, Proc. Am. Philos. Soc. xviii. 1879, 



p. 2(35 ; Di((/es, La Naturaleza, (2) i. 1887, p. 18, pi. iii. fig. 1. 

 Storeria copei, Gann. N. Am. Rept. p. 31 (1883). 



Snout rather pointed ; nasals distinct, separated from tho proe- 

 ocular by the pra3f rental ; no loreal ; internasals small, triangular ; 

 frontal much longer than broad ; one prae- and two postoculars ; 

 temporals 1 + 2; hve upper labials, third and fourth entering the 

 eye ; two pairs of chin-shields, posterior in contact with each other. 

 Scales in 15 rows, outer row smooth. Anal entire, k. broad 

 brown, black-edged dorsal baud with a yellow vertebral line ; flanks 

 and belly light browu. 



Total length 330 millim. ; tail 66. 



Guadalajara, Mexico. 



6. Ischnognathus lineatus. 



Microps lineatus, Hallow. Proc. Ac. Philad. 1856, p. 241 ; JJaird, 



Eep. U.S. Explor. R. R. x. pt. iii. pi. xx.xiv. tig. (1859). 

 Tropidoclouiou lineatum, Cope, Proc. Ac. Philad. 1860, p. 76 ; H. 



Garm. Bull. Illin. Lab. iii. 1891, p. 187; Slejneger, Proc, U.S. 



Nat. Mus. xiv. 1891, p. 504. 

 Storeria liueata, Garm. N. Am. Rept. p. 32, pi. i. fig. 4 (1883). 

 rropidoclonium lineatum iowse. Call., Am. Joicrn. Sc. Sf Art, (3) xli, 



1891, p. 298. 



llostral small, a little broader than deep ; nasal semidividcd ; 

 loreal present, elongate, low ; internasals broader than long, shorter 

 than the prtefroutals ; frontal once and a half as long as broad, 

 longer than its distance from the end of the snout, much shorter 

 than the parietals ; one proe- and two postoculars ; temporals 1 -}- 1 

 or 14-2; five or six upper labials, third, or third and fourth, enter- 

 ing the eye ; posterior chin-shields very short and in contact in 

 front. Scales in 17 or 19 rows, strongly keeled, the two outer 

 rows smooth or faintly keeled. Ventrals 138-150 ; anal entire ; 

 subcaudals 32-36. Light greyish brown above, with a pale yel- 

 lowish or grey vertebral stripe ; the vertebral stripe bordered on 

 each side by a series of black dots ; a white lateral stripe along the 

 second and third rows of scales ; belly white, with two longitudinal 

 series of black spots. 



Total length 250 millim. ; tail 35. Grows to 360 millim. 



United States, cast of the Rocky Mountains and west of Ohio 

 and Mississippi. 



VOL. I. U 



