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VERTEBRATE ANIMALS OF THE UNITED STATES 



P. solarc Gray. Length 140 mm.; tail 51 mm.; 4 equally long occi- 

 pital horns form with the lateral horns an uninterrupted series: deserts 

 of Arizona; westward to Tucson. 



P. modestum Girard. Length 95 mm.; color yellowish brown, 

 sometimes pinkish, with a black patch on each side of the nape : Texas 

 to Arizona; common. 



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P. douglassii (Bell). Length 100 mm.; tail 26 mm.; color brown, 

 with 2 rows of large dark blotches on the back; horns rudimentary; 

 abdominal scales smooth: Oregon and Washington; Rocky Mountains 

 and Great Basin; common. 



Subspecies of P. douglassii 



P. d. douglassii (Bell), In Washington and Oregon. 



P. d. ornatum Girard. In the Salt Lake Basin, 



P. d. hernandesi (Girard) (Fig. 108). Length 94 mm.; tail 39 mm.; 

 color yellowish or brown, with a row of large, obscure middorsal spots: 

 in the Rocky Mountains; common. 



P. d. ornatissimum (Girard). Length 124 mm.; color yellowish, 

 sometimes pinkish, with 2 rows of large dark brown spots on the back: 

 in the Great Basin and the Grand Canyon region. 



