13. PHRYNOSOMA 423 



The general color of the upper surfaces is white, gray, 

 yellow, brown or red, variously marbled with black, brown 

 or slate. A large dark area on each side of the neck is much 

 more distinct in young than in adults. The usual dark dor- 

 sal blotches are very indistinct, as are also the dusky cross- 

 bands on the tail. The head is usually dotted with black 

 or brown. The lower surfaces are yellowish-white, uni- 

 form or spotted with black, brown, or slate. 



Length to anus 30 38 48 77 85 94 



Length of tail 14 29 22 40 45 46 



Snout to ear 7 8 10 15 16 16 



Width of head 9 12 14 21 22 23 



Length of occipital horn 2 2 3 6 8 8 



Fore limb ._ 16 19 22 35 34 37 



Hind limb 20 25 30 46 48 52 



Base of fifth to end of 



fourth toe 8 9 10 14 15 16 



Distribution. — The Desert Horned Toad occupies most 

 of the desert valleys of Nevada and extends its range thence 

 into Idaho, southeastern Washington, western Utah, western 

 Arizona, eastern California, and northeastern Lower Cali- 

 fornia. 



In California it has been collected in Imperial (Coyote 

 Wells, Colorado River opposite Cibola), San Diego (Colo- 

 rado Desert and eastern valleys). Riverside (Palm Springs, 

 Murray Canyon near Palm Springs, Whitewater, Mecca), 

 Los Angeles (Lancaster, Antelope Valley, Fairmont), San 

 Bernardino (Victorville, Barstow, nine miles south from 

 Lovic, five miles west from Amboy, Coyote Holes 20 miles 

 northeast of Daggett, Pilot Knob, Warren's W^ells, Tur- 

 tle Mountains, Blythe Junction, hill east of Oro Grande 

 Needles, Borax Flat), Kern (head of Kelso Valley 16 miles 

 southeast from Weldon, head of South Fork of Kern Val- 

 ley, Chimney Creek, Walker Pass), Inyo (Keeler, Darwin, 



