13. PHRYNOSOMA 385 



one scale between, while those from Utah (ornatissimum) 

 usually have two (one to three). Red coloring of the tem- 

 poral regions is present in Utah specimens rather rarely, 

 and is often absent from Arizona specimens of P. d. hern- 

 andesi. I am unable to detect any constant, or indeed 

 average, difference in proportions, or in the body tubercles. 



Distribution. — This subspecies is at home in the moun- 

 tain ranges and great plateau region of southeastern and 

 central Arizona north to the Grand Canyon of the Colorado 

 Tliver. It ranges south into Sonora and east into New 

 IVIexico and Texas. Specimens from northeastern Arizona 

 seem to be P. d. ornatissitmitn. 



In Arizona, it has been collected in Cochise (Bisbee, 

 Fort Huachuca, Carr Canyon in the Huachuca Mountains, 

 Lowell, Camp Bowie, Paradise in the Chiricahua IVIoun- 

 tains), Santa Cruz (Fort Buchanan, Santa Rita Mountains 

 in Madera and Gardner canons and in the vicinity of Old 

 Baldy), Pima (Tucson, Catalina Mountains, top of Mount 

 Lemmon, Manning Camp, Rincon Mountains), Gila (Sierra 

 Ancha), Navajo (Camp Apache, White River, Rock Creek 

 Canyon), Apache (White Mountains), Yavapai (Prescott, 

 Fort Whipple, Fort Verde, Beaver Creek near Camp Verde, 

 Ash Fork, Seligman), and Coconino (San Francisco Moun- 

 tain, Hull's Spring, Canyon Spring, Grandview, Flagstaff), 

 counties. 



This horned-toad occurs in northern Sonora. 



Habits. — This horned-toad is an abundant form at the 

 higher altitudes in Arizona. A female, caught in the Hua- 

 chuca Mountains, July 27, 1912, (No. 35001), contains 30 

 young. These are about ready for birth. There are 16 

 on the right side and 14 on the left. The total length of 

 the female is 143 mm (tail 41 mm), while that of one of 

 the young is 36 mm. 



