Ritthven — Description of a New Ufa from Nevada. 29 



Ground color dark olive (163) relieved by small spots of pale blue (367). 

 Small dark spots only faintly indicated. Sides above the fold spotted 

 with pale orange (91 ), and below the fold with red (82), the latter color 

 suffusing the sides of the belly. Axillary spots glossy black, not margined 

 with lighter. Tail with taint cross bars. Head brownish olive (155). 

 Belly grayish slate; gular region dark bine; edge of gular fold and spots 

 or short bars on the sides of the chin and neck and on the anterior face 

 of the arm pale orange (Id ). 



Notes on Paratopes. — There are 53 paratypes and in this series there is 

 little variation, particularly in the distinctive characters. As already 

 stated, the dorsal scales vary slightly in size, 25-30 in the length of the 

 head from the posterior margin of the interparietal. The tail is 1.45-1.84 

 times the total length, average in 22 specimens 1.(56. The femoral pores 

 vary from L2-15, average in 28 specimens L3.6. The coloration is very 

 constant. The ground color above runs from light to dark brownish 

 olive, which causes the small spots of blue and black to vary in conspicu- 

 ousness, but they are always approximately of relatively the same size 

 and shape even in the newly born, and the bine spots are nearly always 

 conspicuous. 



Remarks. — There can be no doubt of the distinctness of this form from 

 Uta stansburiana. The most conspicuous difference is in the color pattern 

 which is remarkably constant in our material (Fig. 1). Occasional 

 specimens of the typical form have a similar color pattern, but in none of 

 the collections that the writer has examined are the dark U-shaped 

 blotches and tin' lateral stripes persistently absent or the bine spots so 

 large and generally distributed as in the variety. The dorsal scales are 

 constantly one-fourth or one-fifth smaller than in Uta stansburiana, and 

 it should also be pointed out that the femoral pores are apparently fewer 

 than tin' number given for the typical form by Cope,* Van Denburghf 

 and Ruthven.* 



Habits. — We found this Uta only in the spurs of the Cortez Range and 

 in the River Range at Moleen Canyon. In the former locality it was not 

 common, but in .Moleen Canyon it occurred in some numbers. It was 

 closely confined to the vicinity of rocks. Occasional specimens were 

 found on the ground, but the majority were on the large rocks along 

 the din's, upon which it climbs with all the facility of Sceloperus 

 biseriatus, which frequents the same habitat. The stomach contents of 

 two specimens are made up of insects ami spiders. Females taken on 

 .Inly 6 contained large eggs, others taken on .July 8 contained no eggs, 

 which would indicate that they were laid about this time. On August 14 

 the young were seen for the lirst time. On this date lour individuals 

 between I'L'-lM mm. in body length were found on the ground between 

 the large rocks in Moleen Canyon. They were very agile and when 

 alarmed quickly sought shelter under loose stones. 



* Cope. E. D., Croeodilians, Lizards ami Snakes of North A rica. Rept. r. s. Nat. 



Mus.. l-'.is (1900), p. 308. 



i Van Denburgh, .1. The Reptiles of the Pacific ('oast ami Grea( Basin. Occ. Papers 

 Calif. Acad. Sci., V ils'JT), p. 67. 



t Ruthven, A. G. A Collection of Reptiles and Amphibians from Southern New 

 Mexico ami Arizona. Bull. Amer. Mus. Nat. Hist., XXIII, pp. 529-530. 



