PROCBDEDINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES 



Fourth Series 



Vol. X, No. 4, pp. 33-34 August 6, 1920 



IV 



DESCRIPTION OF A NEW LIZARD (DIPSOSAURUS 



DORSALIS LUCASENSIS) FROM LOWER 



CALIFORNIA 



BY 



JOHN VAN DENBURGH 

 Curator, Department of Herpetology 



The Crested Lizard, Dipsosaiiriis dmsalis, occurs in the 

 desert regions of California, southern Nevada, and western 

 Arizona, and ranges thence south to the end of the peninsula of 

 Lower California. It is one of the few reptiles found both in 

 the Cape Region and farther north in which specific or sub- 

 specific differentiation has not been recognized by name. Geo- 

 graphic variation, however, does occur, as will be shown below. 

 Since the species was originally described from a specimen 

 from the Colorado Desert, California, that form may be known 

 as Dipsosaunis dorsalis dorsalis, and the southern subspecies 

 may be described as 



Dipsosaurus dorsalis lucasensis, new subspecies 



Diagnosis. — Similar to D. dorsalis dorsalis but with rostral 

 usually separated from nasal by but one granular scale. 



