Distribution. — This lizard has been found only in the 

 Cape Region of Lower California, where it has been taken 

 at Cape San Lucas, La Paz, San Jose del Cabo, Miraflores, 

 Sierra San Lazaro, Triunf o, San Antonio, San Bartolo, Buena 

 Vista, Agua Caliente, Todos Santos, and Guamuchil Rancho. 

 Cope records two specimens as having been collected by 

 Belding on Espiritu Santo Island, and Mr. Slevin secured 

 a number there. 



Habits. — This lizard, like others of the genus, is ex- 

 tremely swift when frightened. IVIr. Slevin, on several 

 occasions, observed it running on the hind feet only, the 

 front legs being held clear of the ground and the body 

 raised at an angle. One was found, under a pile of brush, 

 holding in its mouth a Verticaria whose skull had been 

 crushed in its powerful jaws. One was taken from the 

 stomach of a red racer. Coluber flagellufn ficeus. 



107. Cnemidophorus tessellatus tessellatus (Say) 

 Desert Whiptail Lizard 

 Plate 53 



Ameiva tessellata Say, Long's Exped. Rocky Mts., 1823, Vol. II (Phila- 

 delphia), p. 50 (London), p. 351, note 33 (type locality, Arkansas 

 River near Castle Rock Creek, Colorado). 



Cnemidophorus ligris Baird & Girard, Proc. Acad. Nat. Sci. Phila., 

 VI, 1852, p. 69 (type locality. Valley of Great Salt Lake, Utah); 



