CHECKLIST OF THE SNAKES OF MEXICO 143 



KEY TO FORMS OF TOLUCA 



1. Internasals absent 2 



Internasals present 3 



2. Snout bluntly conical ; three posterior maxillary teeth somewhat enlarged, 



with a shallow groove conica 



Snout rather sharply pointed; posterior maxillary teeth very greatly 

 enlarged, with a deep groove the length of tooth megalodon 



3. Body with 3 or 5 more or less distinct lines, ventrals 114 to 126 in males, 



average 119 (80.3 percent less than 122), 118 to 132 in females, average 

 126 (85.6 percent less than 129) ; the second supralabial usually in 

 contact with preocular (88.4 percent) ; belly spotted or stippled (im- 

 maculate in reddish phase) ; 6 or 7 lower labials 5 



Body with spots or transverse marks or tessellated 4 



4. General pattern tending toward narrow, irregular markings, rarely 



lacking any distinct mai'kings, or with a tessellated pattern ; ventrals 

 119 to 130 in males, average 124 (10.2 percent less than 122), 122 to 

 141 in females, average 132 (12.9 percent less than 129) ; usually the 

 second upper labial separated from preocular on one or both sides 



(73 percent) ; belly never spotted or stippled lineata varians 



General pattern usually forming spots transversely elongated, covering 

 several scales ; head usually black or with a black mark ; ventrals 

 111-124 in males; 119-131 in females; belly and tail or at least tail 

 spotted or pigmented lineata acuta 



5. Infralabials generally 6-7 or less lineata wetmorei 



Infralabials generally 7-7 lineata lineata 



TOLUCA CONICA Taylor and Smith 



Toluca conica Taylob and Smith, Univ. Kansas Sci, Bull., vol. 28, 1942, pp. 340- 

 343, figs. 5, 12 (map), pi. 34, fig. 1. 



Type.—'E. H. Taylor-H. M. Smith Coll. No. 27517. 



Type locality. — San Juan Guivini, Oaxaca. 



Ra7ige. — The highlands of central Oaxaca and the Sierra Madre del 

 Sur, Guerrero (known from Chilpancingo and Omilteme, Guerrero; 

 Guajamaloya and San Juan Guivini, Oaxaca). 



TOLUCA LINEATA LINEATA Kennicott 



Toluca lineata Kennicott, in Baird, Report on the United States and Mexican 



boundary survey, vol. 2, 1859, Kept., pp. 2.3-24, pi. 21, fig. 2. 

 Toluca lineata lineata Taylor and Smith, Univ. Kansas Sci. Bull., vol. 28, 1942, 



pp. 343-346, figs. 6, 12 (map), pi. 34, figs. 3, 7, 8.— Smith, Proc. U. S. Nat. Mus., 



vol. 93, 1943, pp. 486, 491-492. 

 Oxyrhina {Achirhina) De FUippii Jan, Arch. Zool. Anat. Fis., vol. 2, 1862, pp. 



60-61 (type locality, Mexico; type in Milan Mus.). 



Type.—U.S.'NM. No. 2103. 



Type locality. — Valley of Mexico. 



Range. — Southern San Luis Potosi southward to Distrito Federal, 

 westward to central Michoacan, eastward to Tlaxcala, avoiding the 

 deserts of central Puebla (known from numerous localities in Distrito 



