no. 2078. REPTILES OF NORTHWESTERN NEVADA— RICHARDSON. 413 



maximum, minimum, and average measurements and scale counts 

 in a number of individuals. Tail length is not included, since most 

 of the specimens have broken or regenerated tails. Six males have 

 a tail length ranging from 70 mm. to 77 mm., average 74 + mm. In 

 five females the minimum length is 66 mm., the maximum 69 mm., 

 and the average 67+ mm. The femoral pores likewise are fewer 

 in number (average 13 + ) than in the other forms considered below. 

 Recently Doctor Ruthven (1913) has described a new form of this 

 genus, TJta stansburiana nevadensis, from the Cortez Range, west of 

 Carlin, Nevada. The distinctive characters which he mentions are 

 color, the small size of the dorsal scales, and reduced number of 

 femoral pores. The peculiar spotted type of coloration described 

 by him — that is, the dorsum, with the ground color broken by small 

 spots of blue and faintly indicated black spots — is abundantly rep- 

 resented in my series from Snake River, Idaho, Quinn River Crossing, 

 Pine Forest Mountains, Virgin Valley, Derby, Pyramid Lake In- 

 dian Agency, Nevada, and Abert Lake, and Summer Lake, Oregon. 

 In this same series there are many individuals which do not possess 

 this type of coloration. On the other hand, there are many speci- 

 mens of TJta stansburiana elegans in the Colorado River series which 

 are the exact counterparts of the spotted type found in Nevada, 

 Oregon, and Idaho, except that the ground color is slightly lighter. 

 In regard to the other characters, size of dorsal scales, and number 

 of femoral pores, it is apparent that nevadensis is identical with 

 stansburiana, as I have here denned it. Nevadensis has small, 

 weakly-keeled dorsal scales (25 to 30 in a head length), and the 

 femoral pores average 13.6. Although I have not seen specimens 

 from the type locality of TJta stansburiana, I have had at my com- 

 mand a good series from adjacent territory which was reasonably 

 uniform in color and squamation. Therefore, until a good series of 

 specimens from the exact type-locality is available and can be shown 

 to differ from the TJta of eastern Nevada, it seems advisable to retain 

 the name stansburiana for the form here defined. 



UTA STANSBURIANA ELEGANS (Yarrow). 



Locality. — Specimens of the small scaled TJta from the desert 

 regions of southern California, Arizona, New Mexico, Texas, and 

 parts of Mexico, represent a new form, to which is here given the old 

 name elegans. TJta elegans, described by Yarrow (1882a) from speci- 

 mens sent from La Paz, Lower California, Mexico, has for some time 

 been considered synonymous with TJta stansburiana in that it was 

 based upon color characters which proved to be inconstant. How- 

 ever, there are structural differences which readily distinguish this 

 southern form from the typical stansburiana. 



