492 8. TEIIDM 



f. — Ground color of throat and chest whitish, yel- 

 lowish, grayish, or slaty, not chiefly black, 

 g. — Markings on sides of head not well-defined, 

 almost obsolete, 

 h. — Throat usually suffused with slate or gray. 

 Western States, northern Sonora, north- 

 eastern Lower California. 



C. t. tessellatus.— p. 508. 



h'. — Throat not suffused with slate or gray, 

 an ill-defined middorsal light line. Cen- 

 tral Lower California. 



C. bartolomas. — p. 523. 

 g*. — Markings on sides of head very distinct and 

 well-defined; throat not (sometimes slight- 

 ly) suffused with gray or slate, 

 hh. — Median subcaudal scales not nearly all 

 with spots, 

 i. — Spots on throat few and small; central 

 gular and collar scales smaller. Cali- 

 fornia. 



C. t. mundus. — p. 516. 

 i . — Spots on throat numerous and large, often 

 forming irregular transverse bands; cen- 

 tral gular and collar scales larger. South- 

 ern California and northwestern Lower 

 California. 



C. t. stejnegeri. — p. 519. 



hh'. — Median subcaudal scales nearly all with 

 large black spots. Cerros and Natividad 

 islands. 



C. multiscutatus. — p. 526. 

 f . — Ground color of throat or chest often black or 

 blackish. 



