10. UTA 207 



I therefore follow Schmidt in recognizing an eastern sub- 

 species, U. ornata ornata, and a western one, U. ornata 

 symmetrica. It seems to me that there is too much individual 

 variation in the large series at hand to permit the recogni- 

 tion of a third subspecies, U. ornata linearis. 



Distribution. The Tree Uta is common from New 

 Mexico, Arizona and northern Sonora to southeastern 

 California. 



In California, it has been found only in the valley of 

 the Colorado River in Imperial (Hanlon's Ranch, Fort 

 Yuma, Pilot Knob, five miles north from Laguna, five miles 

 above Yuma, four miles below Potholes, eight miles east 

 from Picacho, 20 miles above Picacho, vicinity of Palo 

 Verde, 28 miles below Ehrenberg), and San Bernardino 

 (Needles) counties. 



Yarrow also recorded the species from "Nevada," but 

 there has been no confirmation of this record. 



In Arizona, this species is widely distributed and occurs 

 from the low altitude of Yuma, near sea level, up to at 

 least 6,800 feet on San Francisco Mountain and in the 

 Huachucas. It has been collected in Yuma (Yuma, 10 

 miles below Cibola, Papago Wells), Mohave (Mohave 

 Desert, Fort Mohave), Coconino (Grand Canyon of the 

 Colorado, San Francisco Mountain, Little Colorado, Walnut 

 Creek near Flagstaff, Flagstaff, Williams, Oak Creek), 

 Navajo (Camp Apache), Yavapai (Fort Whipple, Prescott), 

 Maricopa (Phoenix, Cave Creek), Gila (San Carlos), Pinal 

 (Oracle), Graham (Fort Grant), Pima (Tucson, Santa 

 Cruz River, Fort Lowell, in the Catalina Mountains at the 

 steam pump 1 8 miles north of Tucson, and in Ventana and 

 Sabino Canyons and East Sabino Basin, in the Santa Cata- 

 lina Mountains, Sawmill and Madera canyons in the Santa 

 Rita Mountains, and in the Baboquivari Mountains), Santa 



