28 BULLETIN 154, UNITED STATES NATIONAL MUSEUM 



41. Supraoculars iiornuilly four; liack lined or not lined, if lined, lines 

 usually moi-e or less wavy or broken; sides with spots, crossbars or 



recticulatious ; spots, if present, usually not bluish 42. 



.Supraoculars nornuilly three; back with several stright, narrow, conspicuous 

 lines (rarely only with one) ; sides, i--.potted, or with spots and traces of 

 narrow, longitudinal, light lines, but never with crossbars or reticulations; 



spots often bluish C. deppii deppii (Wiegmann), p. 56 



(Mexican coast southward from Nayaiit and ^'cra Cruz through Cen 

 tral America to Costa Rica.) 

 4"_'. Lower surfaces white or covered by a more or less black or slaty suf- 

 fusion; throat usually white, black or slaty and sometimes with large 

 patches of black, brown or chestnut; sometimes with three irregular 



dorsal lines 43. 



Lower surfaces covered by a more or less, bluish or blu. --black suffusion; 

 throat white or bluish, and never with large patches of black, brown, or 

 chestnut; not with three irregu'ar dorsal lines. 



C. sexlineatus gularis (Baird and Girard), p. 97. 



(Oklahoma. Texas, central Cbibualiua. and Sinaloa. snutli to (iuate- 



mala. I 



4."!. Dorsal lines or indicat ous of lines, if present and distinct, four or more 



in number and not unusually w'de; color of back varied; throat never 



with much brown or chestnut ; abdomen of young seldom with bluish_ 44. 



Dorsal lines or indications of lines (excluding a pair of irregular and 



widened lower laterals whit'h are often pi-esent. one on each side I three in 



number, irregular and unusually wiiU- : ground coloi- of back and throat 



of adult usually i-icii ciiestnut or brown: abdomen of young often witli 



bluish C. maximus Cope. ]). 218. 



(Southern Lower California.) 



44. Under surface of tail and feet usually white, bluish, black, gray, or yellow- 



ish, not more or less suffused with bright red or piidc. 



C. tessellatus tessellatus (Say), p. 14(). 



(Western North America from Oregon and Idaho, southeast to Coa- 



huila and west to the Pacific Ocean.) 



Under surface of tail and feet usually moi-e or less suffused with bright 



vvd or pink, not entirely white, bluish, black, gi'ay. or yellowish 4."). 



45. lUack markings on temporal regions absent or iew and ill-detined ; dorsal 



and lateral markings on body showing both transverse and longitudinal 

 arrangement in large specimens, at least; each dark unit or spot usually 

 s(iiiare or rectangular in outline, n.ot noticeably rounded. 



C. tessellatus rubidus Cope, p. 199. 

 (Southern Lower California from San Marcos Island to La Paz P>ay. ) 

 Black markings on temporal regions well defined; dorsal and lateral mark- 

 ings on body showing a predominatingly longitudinal arrangement: back 

 covered by alternate longitudinal chains of black and white, individual 

 sj)ots in black chain r;ii'ely scpiare or rectangular. 



C. tessellatus celeripes ( Dickersoii ), p. 202. 

 (San Jose Island. Oulf of California, Mexico.) 



46. Dorsal region striped or reticulated, not of one color 47. 



Dors.-il region not striped or reticulated, nnicolor. 



C. hyperythrus pictus (Van Denburgh and Slevin), p. 242. 

 (Monserrate Island, Gulf Of California, Mexico.) 



