TEIID LIZARDS OF THE GENUS CNEMIDOPHORUS 199 



in considerable detail above (see p. 160). A further discussion of the 

 affinities of tessellatus is presented in the summary of the tessellatus 

 group (pp. 221-226). 



The aj^parent relationships of the parent tesnellatus^ and its de- 

 rivatives, cmius, martyris^ and ruhidus, are shown by the following 

 diagram (p. 199). The probable affinity witli maximdvs is also 

 indicated. 



CNEMIDOPHORUS TESSELLATUS RUBIDUS Cope 

 PINK-TAILED WHIPTAIL 



1892. Cnemidophorus tessellatus nibidus Cope, Trans. Amer. Philos. Soc, vol. 

 17, r>. 36 (type locality, "Santa Margarita Island," west coast of "Lower 

 California," Mexico; 7 cotypes, U.S.N.M. Nos. 15149-15155, collected by the 

 U. S. Fish Commission) ; Amer. Nat., vol. 26, 1S92, p. 522. — Boulenger., Zool. 

 Eec. for 1892, vol. 29, " Rci)tilla," 1893, p. 23.— Cope Amer. Nat., vol. 30, 1S9G, 

 p. 1017 ; Ann. Kept. U. S. Nat. Mus. for 1898, 1900, p. 584. 



1895. Cnemiduphorus i-uhidus Van Denburgh, Proc. Calif. Acad. Sci., scr. 2, 

 vol. 5, p. 126.— BoulexNGER. Zool. Rec. for 1895, vol. 32, " Keptilia." 1896, 

 p. 19. — Van Denbuegh, Proc. Calif. Acad. Sci., ser. 3, vol. 4, 1905, pp. 25-26. — 

 Gadow, Proc. Zool. Soc. London, 1906, p. 371. — -Van Dbnburgh and Sle\'in, 

 Proc. Calif. Acad. Sci., ser. 4, vol. 4, 1914, ]). 145. — Stejnbger and Barbour, 

 Check List N. A. Amph. and Kept., 1917, p. 67. — Dickerson, Bull. Amer. 

 Mus. Nat. Hist., vol. 41, 1919, p. 477. — Van Denburgh and Slevin, Proc. Calif. 

 Acad. Sci., ser. 4, vol. 11, 1921, p. 52.^Van Denburgh, Occas. Pap. Calif. 

 Acad. Sci., vol. 10, 1922, p. 546. — Nelson, Mem. National Acad. Sci., vol. 21, 

 1922, p. 114.— Schmidt, Bull. Amer. Mus. Nat. Hist., vol. 46, 1922, p. 674.— 

 Stejneger and Barbour, Check List N. A. Amph. and Kept., ed. 2, 1923, p. 

 73.— Slevin, Proc. Calif. Acad. Sci., ser. 4, vol. 15, 1926, p. 205. 



1899. CnemidoplioruH grahamii Mocquard, Nouv. Archives du Mus., ser. 4, vol. 

 1, p. 315, (part). 



1903. Cneinidoplionis tesschitii.s riiJtidiis (iAnow, Proc. Hoy. Soc. London, vol. 

 72, p. 119. 



1919. Cnemidoi)horus vandenhu,rghi Dickerson, Bull. Auicr. Mus. Nal. Hist., 

 vol. 41, p. 477 (type locality, "Carmen Island, Gulf of California, Mexico"; 

 type specimen, U. S. N. M. No. 64449, C. H. Townsend. collector). — Nelson, 

 Mem. National Acad. Sci., vol. 21, 1922, p. 114.— Schmidt, Bull. Amer. Mus. 

 Nat. Hist., vol. 46, 1922, p. 675.— Stejneger and Barbour, Check List N. A. 

 Amph. and Kept., cd. 2, 1923, p. 74. 



Systematic notes. — In describing ruhidus as a subspecies of tessella- 

 tus Cope recognized its close similarit}^ to that form. Van Den- 

 burgh, hoAvever, disregarded this, and (1895) wrote that "Prof. Cope 

 is not followed in the use of a trinomial because no intergradation 

 of this with other forms has been shown." 



An examination of the specimens from San Bartolomc Bay men- 

 tioned by Slevin (1926) as possible intergrades betw^een tesselatus 

 and rtibidus shows them to be much nearer to tessellatus than to 

 ruhidus, for even the specimen said to resemble nibidus in the dorsal 

 coloration presents the regular pattern of nobidus on only one side 

 and the broken pattern of tessellatus on the other. Also, there is no 



