TEIID LIZAltDS OF THK GKNIJS CXEMIDOPnOItUS 07 



1S77. Ciicinidophoriin itiiicolar ("oi'K. True Anu'r. Pliilds. Si^c. vdI. 17, p. 1)3 



(type locality, "West Tohu:iiitei)ec,"' Oaxaca, Mexico): Proc. Ainer. Philos. 



See, vol. IS, 1879. p. 270.— O'SiiAUGHNESSY, Zool. Rec. for 1877, vol. 14, 1870, 



" Reptilia," p. 6. — Sumichrast, Bull. Soc. Zool. de France, vol. 5, 1880, p. 



177 ; La Naturaleza, ser. 1, vol. 6, 1884, p. 39. 

 1802. Cncmidophorusi f/nttatiui giittatus Cope, Trans. Amer. Pbilos. Soc, vol. 



17. p. 32.— Gadow. Proc. Zool. Soc. London, 1906, pp. 309, 325. 

 1892. Cncmidoplwrus (jiittatus iiuniutahilis Cope, Ti-ans. Amer. Philos. Soc. vol. 



17, p. 31.— Gadow, Proc. Zool. Soc. London, 1906. pp. 309, 326. 

 1892. Cncinidophoi'iis ;/iitt(ttiis mirrohpidopK.s Cope, Trans. Amer. Philos. Soc, 



vol. 17, p. 32. 

 1892. C'ii(iiiii1iii)hori(s (/uttatiis uiiicolor Cope. Trans. Amer. Philos. Soc, vol. 17, 



1). 32. 

 lOo:'.. ('iiciiiidophonis (/iittatii.s (/iilfata Gadow. Proc lioy. Soc Lond'in, vol. 72, 



p. 115. 

 1903. CiK iiiidopliorns (/iitl(ftiis striata (iAnow, Proc. lioy. Soc. London, vol. 72, 



p. 115 (type locality, " Isthmus of Tehuantepec," Oaxaca, ;Mexico). 

 1905. Cnemidophorus fitriatns Gadow, Proc. Zool. Soc. London, 1905, p. 195. 



Systematic notes. — The Mexican race-runner vras described by 

 AViegmann in 1834 from •■' Mexico " and, although the original 

 account^^ is incomplete, subsequent workers have elaborated it to 

 definitely fit the present form. It is evident that the type is of the 

 spotted, rather than of the lined or unicolor phases of the species. 



As described by Gadow (190G, p. 373), the young examples of 

 guttatus., as well as some larger, forest inhabiting, individuals, are 

 dull and frequently even unicolor. It seems that with development 

 stripes or spots appear, usually to parti}' vanish again. In the case 

 of the striped form, the lines often break into spots posteriorly 

 before becoming obsolete, and then perhaps anteriorly as well. 

 There is much individual variation in regard to these pattern 

 changes. In some regions the lizards apparently retain a distinctly 

 spotted or lined pattern throughout life. 



The dull phase of guttatus was described as unicolor by Cope 

 (1877), who diagnosed it very fully. The same author recognized 

 his mistake later (1887, p. 44) and listed this form in the synonym}' 

 of guttatus. 



The striped pha.se of guttatus., which apparently reaches its max- 

 imum development in certain parts of Oaxaca, was called •' immuta- 

 hilis" by Cope (1877). Thus, as remarked by Gadow (190G, p. 

 326), by the irony of fate ivwiutahiUs became the proper name of 

 one of the most variable of lizards. The chief character of this 

 form was " the retention of stripes throughout life." Gadow (1906, 

 p. 287) wrote that '• C. guttatus and immutahilis were considered as 

 good species by Cope and Boulenger, but intermediate forms are 



11 Because of its obscuritj^ it is thought best to present the original Latin diagnosis of 

 (juttatus in full, as follows : " Squamis gulae intormediis majoribus squamis mcsoptychii 

 magnis, subrhombeis, imbricatis ; dorso cineraceo, guttis albidis longitudinaliter adsperso ; 

 lateribus superne nigricantibus, immaculatis, vittaque gemina marginatis." 



