180 3. IGUANIDM 



Distribution. — This lizard ranges from western Texas 

 to central Arizona. In Arizona it has been collected in 

 Navajo County at Camp Apache j in Pima County on a 

 rocky hillside near Fort Lowell, on Mineral Hill south of 

 Tucson, in Ventana, Pima and Sabino canyons and the foot- 

 hills of the Catalina Mountains; in Maricopa County at 

 Cave Creek and Agua Caliente; and in Yavapai County 

 at Fort Verde and Kirkland. 



The National Museum has this species from "Sonora." 



Habits. — This is a larger species than H. mactdata 

 appj-oximam, being about equal in size to CalUsait-rus ven- 

 tralis, which it much resembles. Its habit of constantly 

 wanting to get up on the tops of boulders attracts attention 

 to it in life. It usually is found on rocky hillsides, while 

 H. in. approximans seems to prefer the mesas or sandy 

 liver bottoms. 



Mr. Strecker, who observed this lizard in Texas, states: 

 "The eggs are from eight to twelve in number and are de- 

 posited in hard ground to a depth of five or six inches. 

 The breeding season extends from May to August. Breed- 

 ing females are brilliantly colored, the whole underparts 

 being suffused with bright crimson. The nuptial colors in 

 the male are sulphur yellow." 



Genus 10. Uta. 



Uta Baird & GiRARD, Proc. Acad. Nat. Sci. Phila., Vol. VI, 1852, p. 69 



(type, stansburiana). 

 Uro-saurus Hallowell, Proc. Acad. Nat. Sci. Phila., Vol. VII, 1854, 



p. 92 (type, graciosus). 

 Phymatolefis Dumeril, Arch. Mus. Hist., Nat. Paris, Vol. VIII, 1856, 



p. 548 (type, bicarinatus') . 

 Petrosaurus Boulenger, Cat. Lizards Brit. Mus., Vol. II, 1885, p. 205 



(type, thalasiind). 



The head and body are moderately depressed, and 



