9. HOLBROOKIA 173 



Agua Caliente Canyon, and in the Pajarita Mountains), 

 Graham (Fort Thomas), and Cochise (Fairbank, Fort Hua- 

 chuca, desert at the mouths of Carr, Gardner, Ash, Monte- 

 zuma, and Ramsey canyons in the Huachuca Mountains, 

 Bisbee, Willcox, Apache, Rucker Canyon and Cave Creek 

 in the Chiricahua Mountains), counties. 



This lizard occurs also in Sonora (Duros Millos and the 

 head waters of the San Pedro River). 



Remarks. — Mr. Karl P. Schmidt has recently studied the 

 genus Holbrookia and published a preliminary abstract of 

 h:s conclusions. He not only regards H. maculata flavllenta, 

 from the "White Sands" of southern New Mexico, as a dis- 

 tinct subspecies, but recognizes five species and subspecies 

 from Arizona. Aside from H. texana, he distinguishes 

 these chiefly by differences in proportions, as follows: 



a. — Tail longer than body in both sexes, 

 b. — Size large, robust, frequently exceeding 60 mm. j 

 femoral pores usually 12 or more. Lower altitudes 

 from Tucson, Arizona, south to Sinaloa. 



H. elegans. 

 b'. — Size smaller, slender, body less than 60 mm.; 

 femoral pores usually less than 12. Altitude above 

 5,000 feet, Huachuca Mts. to Nogales and Bisbee, 

 Arizona. 



H. pulchra. 



n'. — Tail shorter than body in female, usually also in male. 



bb. — Tail shorter .42 to .50 of total length in male, .42 



to .48 in female; hind leg shorter .72 to .83 of total 



length in male, .65 to .78 in female. Northern 



Mexico, southern Arizona. 



H. m. approximans. 



