288 3. IGUANID& 



more or less washed with blue, often with a tendency to the 

 formation of narrow oblique bands. 



Length to anus 58 61 61 62 64- 65 



Length of tail 90 87 95 95 96 94 



Snout to ear 12 13 13 13 12 12 



Width of head.... . 11 12 11 12 11^ 1 1 1 /* 



Snout to back of 



interparietal 12 12 12 12 11^ 12 



Fore limb 24 27 25 27 27 26 



Hind limb 43 44 43 43 46 44 



Base of fifth to end of 



fourth toe 17 17 17 18 18 \7 l /2 



Remarks. This subspecies agrees with S. g. gracilis in 

 having smaller dorsal scales than are found in typical S. g. 

 graciosus. It differs from S. g. gracilis chiefly in coloration. 

 Mr. Camp states that "the series from the San Gabriel 

 Mountains includes the lightest-colored males of the sub- 

 species, and they are in this respect very good intermediates, 

 despite their isolated station, between the small, light-colored 

 graciosus [gracilis] of Mount Pinos and the large, dark 

 blue specimens of vandenburgianus from the head waters 

 of the Santa Ana River, and farther south." 



Distribution. This southern subspecies of the Mountain 

 Swift occupies the higher ranges of southern California and 

 northern Lower California. Specimens from San Bernar- 

 dino and Los Angeles counties are stated by Mr. Camp to 

 be more or less intermediate between the small, light-col- 

 ored, northern subspecies which occurs from Mount Pinos, 

 Ventura County, northward, and the large, dark blue speci- 

 mens of S. g. vandenburgianus from the headwaters of the 

 Santa Ana River, and farther south. 



Miss Atsatt observes that, in the San Jacinto region, 

 "the range of this lizard is in the Transition zone; but it 



