TEIin LIZAl'vDS OF THE GKXUS CNEMIDOPHORUS 27 



Supraoculars three; posterior supraocular grauulos usually small and many- 

 noruuUly exteuding forward past the ]iosterior border of llie tliira 



supraocular C. guttatus ( Wieiiuiaun) , p. (id. 



(Mexican coast southward from Vera Cruz and :\lichoacau to Chiapas.) 

 O.J. Body over So mm. (suout to anus I ; size larire. 



C. sexlineatus gularis (JSainl and (Jirard), p. 9". 

 (Okhihoma, Texas, central Chihualiua, and Sinaloa, soutli to Guate- 

 mala.) 

 Body under 85 mm. ; size small 40. 



36. Body less than 85 mm. long 37. 



Body more than S5 mm. Ions. 



C. sexlineatus gularis (Bninl and (Jirardi. p. 97. 

 (Oklalioma. Texas, central Chihuahua, and Sinaloa, south to Guate- 

 mala.) 



37. No spotting in the area above the level of the tympanum and anterior to the 



insertion of the forearm; spots relatively well detined, v(>ry small, and 

 not yellowish C. bacatus Van Denburgh and Sleviii. p. 211. 



(San Pedro Nolasco Island, Gulf of California, Mexico.) 

 Spots present in the area above level of tympanum and anterior to the 

 insvertion of the forearm ; spots often obscure and diffuse, usua.ly orange 

 or yellowish C. catalinensis Van Dtniburgh and Slevin, p. 213. 



(Santa Catalina Island. Gulf of California, Mexico.! 



38. Middorsal region without an unusually broad, unicolor. light br<iwnish 



band : dorsal ground color of same general intensity as that of sides, or 

 only a narrow median li.glit band present as in sc.rli)icafii-s : back often 

 spotted, tessellated, cross-barred or lined, and if lined, lines often 



straight 39. 



Middorsal region with an unusually bi'oad, unicolor, light, brownish band : 

 dorsal ground color lighter than that of the sides ; stripes, and spots, if 

 present, confined to the lateral region; lines more or less, obscure, irregular 



or wavy C. deppii cozumelus Gadow, p. 63. 



(Cozumel and Mujeres islands, near coast of Quintana Roo. southern 

 Mexico. ) 



39. Body covered by more or less coarse dorsal markings; usually at least 



some indication of longitudinal arrangement in the pattern of the dorsal 

 or lateral markings ; size often large, length from tip of snout to anus 



often over 80 mm. in adults; pattern sometimes obscure 41. 



Body covered by fine, close-set, and often poorly defined, dorsal markings 

 and recticulations ; little or no indication of longitudinal arrangement in 

 the dorsal markings ; size always small, length from tip of snout to anus 

 rarely over 80 mm." 40. 



40. I-abials deep or moderate brown or black. 



C. tessellatus martyris (Sle.jneger i. ]>. 20."). 

 (San Pedro ^lartir ami South San Lorenzo islands, (iulf of California, 

 Mexico. ) 

 Labials light gray, slate, or light brown. 



C. tessellatus canus (Van Denburgh and Slevin), p. 20S. 

 (Sal Si Puedcs. aixl North, and South San Lorenzo islands, Gulf of 

 California, .Mexico, i 



'III spiti' of all clTorts to dnnv a concise clistiuction bctwcciia minorit.v of specimens of 

 tessellalus and tlie populations here distinguished a.s martyris and canus, a few of the 

 former will fit here in so far as the key is concerned. These must be referred to 

 tcssilldtuK fiir rcasiiiis tliat are explained in the text. 



