CHECKLIST OF REPTILES OF MEXICO 205 



Genus ELGARIA Gray 



Elgaria Ghat, Ann. Mag. Nat. Hist,, ser. 1, vol. 1, 1838, p. 390. — Tihbn, Amer. 



Midi. Nat., vol. 41, 1949, pp. 593-596, figs. 8-9. 

 Tropidolepis Skilton (nee Cuvier), Amer. Journ. Sci., ser. 2, vol. 7, 1849, p. 202 



(type, T. scincicauda Skilton^ . 



Genotype. — Cordylus {Gerrhonotus) multicarinatiLsB\simYi\].e= Elgaria 

 multicarinata multicarinata. 



Range. — Chihuahua and Baja California, northward through 

 California to British Columbia, Utah, and Montana. 



Species. — Six species and 13 forms. Six forms occur in Mexco. 



KEY TO MEXICAN SPECIES OF ELGARIA 



1. Alternate black and white marks on labials (white spots somewhat ocellate). 



kingii group 4 

 No alternate black and white marks on labials multicarinata group 2 



2. Temporal scales all or partly keeled 3 



Temporal scales smooth; granular area of lateral fold white with gray or black 

 reticulations; scales on arm smooth; 2 rows of scales keeled on thigh; lateral 

 body scales smooth cedrosensis (p. 206) 



3. Large (130 mm. maximum); dorsals all heavily keeled; two upper temporal 



rows sharply keeled, others weakly keeled or nearly smooth; three rows of 

 keeled scales on arm; dark transverse bands indented with white markings 

 5 scale rows above lateral fold and on back; ventral longitudinal lines faint 



or obsolete multicarinata webbii (p. 207) 



Smaller (114 mm. maximum); dorsals less strongly keeled; two upper temp- 

 orals strongly keeled; 1 to 3 keeled rows on arm; dark ventral longitudinal 

 lines; wide brown band on temporal region from eye to ear. 



multicarinata nana (p. 207) 



4. Granular area of lateral fold white crossed by black bands usually continuous 



with dark bodv bands; eight dorsal scale rows keeled moderately, lateral rows 

 faintly keeled; 4 internasals of about same size; arm scales smooth; thigh 



scales with 2 rows keeled paucicarinatus (p. 206) 



Granular area of lateral fold dull gray; heavy broad dorsal bands on neck, body, 

 tail, the latter almost encircling tail; usually 6 or 8 weakly keeled dorsal 

 scale rows; scales on arm and thigh smooth 5 



5. Dorsal longitudinal scale rows usually 16; scales from occiput to posterior 



part of thigh in 51 to 56 transverse rows (average, 52.9); transverse row of 

 four anterior temporals, uppermost always in contact with uppermost 

 secondary temporal; granular area in fold usually black, kingii kingii (p. 205) 

 Dorsal longitudinal scale rows usually 14; scales from occiput to posterior part 

 of thigh 55 to 60 (average 57.3) ; four anterior temporals, uppermost sep- 

 arated from uppermost secondary temporal (60 percent) ; granular area in 

 fold usually gray kingii nobilis (p. 206) 



ELGARIA KINGII KINGH Gray 



Elgaria kingii Geay, Ann. Mag. Nat. Hist., vol. 1, 1838, p. 390. 



Elgaria kingii kingii, Tihen, Trans. Kansas Acad. Sci., vol. 51, 1948, pp. 299-300. 



Gerrhonotus kingii, Bocourt, Nouv. Arch. Mus. Hist. Nat. Paris, vol. 7, p. 106; 

 Mission scientifique au Mexique . . ., fitudes sur les reptiles, livr. 5, 1878, 

 pp. 339-342, pi. 21C, figs. 2, 2a (name attributed to Bell, his manuscript 

 published by Gray). 



