Vol. XXVI, pp. 27-30 February 8, 1913 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 





i 



DESCRIPTION OF A NEW UTA FROM NEVADA. 



BY ALEXANDER G. RUTH YEN, 

 University of Michigan Museum of Natural History. 



The Walker-Newcomb Expedition of the University of Mich- 

 igan, in the summer of 1912, obtained a large series of Utas in 

 northeastern Nevada that appear to represent a well-defined 

 subspecies of Uta stansburiana. None of the several names in 

 the synonomy of the typical form can be applied to this race. 



Uta stansburiana nevadensis subsp. nov. 



Diagnosis. — Similar to Uta stansburiana in size, proportions and scala- 

 tion, except that the dorsal scales are less strongly keeled and smaller, the 

 distance from the end of the snont to the notch in the posterior side of 

 the occipital plate being equal to 25-30 scales on the middle of the back 

 as compared with 18-23 in the Uta stansburiana. Dorsal scales increasing 

 in size posteriorly from the head but still pearl -like above for some 

 distance behind the shoulders; on the back feebly keeled, the keels often 

 being almost tubercular. Femoral pores 12-15 in 28 specimens, average 

 L3.6. Tail 1.45-1.84 times length of head and body in 22 specimens, 

 average L.66. Ground color above dark to pale olive (generally about 

 163* or L67 to 172 or a little lighter) relieved by many small spots (about 

 the size of four scales) of pale greenish blue (367), ami generally by many 

 small black spots (about the size of two scales) that arc seldom well de- 

 lined and exhibit a tendency to be arranged in four rows, two on each 

 side of the back. On the sides numerous rounded or vertically elongated 

 <pots that are dull yellowish (203d) in the females, and orange (91) above 

 and dark red (82) below in the males, the latter color also suffusing the 

 sides of the belly. A single row of dark cross bars on the tail. A dark 

 stripe through the eye and one below the eye, both continued on the 

 temples; occasionally a faint indication of a light stripe between the two 

 ami of another below the lower one, but these never distinct on the neck 

 or indicated on the body. Belly dull white in the females and young 

 males, becoming bluish in old males. Throat in females white or dusky, 

 barred with bluish slate and white or pale orange, in the males dark blue 

 (sometimes 394) in gular region with numerous lateral bars of bluish 

 * ( <><le des Couleurs, Klincksieck et Valette, Paris. 



7— PKOC. Biol. Soc. Wash., VOL. XXVI, 1913. (27) 



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