, 18. CNEMIDOPHORUS 529 



1 1 2. Cnemidophorus melanostethus Cope 

 BLACK-THROATED WHIPTAIL LIZARD 



Cnemidophorus melanostethus COPE, Proc. Acad. Nat. Sci. Phila., 1863, 

 p. 104 (type locality, Region of the Colorado of California?); 

 COPE, Proc. Acad. Nat. Sci. Phila., 1886, p. 310; GADOW, Proc. 

 Zool. Soc. London, 1906, p. 372; RUTHVEN, Bull. Amer. Mus. 

 Nat. Hist., Vol. 23, 1907, p. 560; VAN DENBURGH & SLEVIN, Proc. 

 Cal. Acad. Sci., Ser. 4, Vol. 3, 1913, p. 393; STEJNEGER & BAR- 

 BOUR, Check List N. Amer. Amph. Rept., 1917, p. 66. 



Cnemidophorus tessellatus melanostethus COPE, Bull. U. S. Nat. Mus., 

 Vol. I, 1875, P- 46; COPE, Report U. S. Nat. Mus. for 1898, 1900, 

 p. 581, fig. 109. 



Cnemidophorus tigris melanostethus COUES, Surv. W. looth Merid., 

 Vol. V, 1875, p. 603; YARROW, Bull. U. S. Nat. Mus., No. 24, 

 1883, p. 45; VAN DENBURGH, Proc. Cal. Acad. Sci., Ser. 2, Vol. 6, 

 1896, p. 344; STEJNEGER, Proc. U. S. Nat. Mus., Vol. 25, 1892, 

 p. 151; STONE, Proc. Acad. Nat. Sci. Phila., 1911, p. 231. 



Cnemidophorus tessellatus cethiops COPE, Report U. S. Nat. Mus. for 

 1898, 1900, p. 582 (type locality, Hermosillo, Sonora, Mexico). 



Cnemidophorus punctilinealis DICKERSON, Bull. Amer. Mus. Nat. Hist., 

 Vol. 41, 1919, p. 475 (type locality, Tiburon Island, Gulf of 

 California, Mexico); NELSON, Mem. Nat. Acad. Sci., Vol. XVI, 

 1921, p. 171. 



Description. Snout long, with nearly vertical sides. 

 Nostrils opening in large anterior nasal plates, latter in con- 

 tact on top of snout. Posterior nasal forming sutures with 

 anterior nasal, first, second and sometimes third labials, 

 loreal, prefrontal, and frontonasal plates. Loreal in con- 

 tact with third and fourth labials, first subocular, preocular, 

 first superciliary, prefrontal, posterior nasal, and sometimes 

 first supraocular, plates. Four supraoculars, first and fourth 

 smaller than others. Second, third and fourth supraocu- 

 lars separated from superciliaries by small convex granules. 

 Similar granules intrude between third and fourth supra- 

 oculars and frontoparietal and parietal. Occipitals repre- 

 sented by from two to four transverse series of small plates 



