148 BULLETIN 199, UNITED STATES NATIONAL MUSEUM 



Genotype. — Uta stansburiana Baird and Girard. 



Range. — Western Texas to California, north to Washington, south 

 through Baja Cahfornia and adjacent islands, and into the northern 

 tier of Mexican states from Sonora to Coahuila. 



Species. — Nine are here listed, with a total of eleven forms; only one 

 form (U. s. stansburiana) is extralunital, making a total for the genus 

 of 12 forms. The entire genus is badly in need of careful revision, 

 however; considerable shuffling of the nominal species and subspecies 

 is to be expected eventually. 



KEY TO MEXICAN SPECIES OF UTA 



1. Dorsal scales shorter, not imbricate, not mucronate, often with intervening 



granules; a dark blotch behind axilla 2 



Dorsal scales larger, imbricate at least centrally, usually without intervening 

 granules; caudal scales imbricate, keeled, and strongly mucronate 4 



2. Scales on base of tail not imbricate; not unicolor above 3 



Scales on base of tail imbricate, strongly keeled and mucronate; no dark or 



light markings above, except rarely a few pale blue dots. 



nolascensis (p. 151) 



3. Basal caudals weakly keeled, not or but shortly mucronate; about 110-125 



dorsals from interparietal to back of thighs; 26-30 of largest dorsals equal 

 length of head to back of interparietal plate; gular region bluish 



stellata (p. 150) 



Basal caudals keeled and strongly mucronate; about 106-116 dorsals from 



interparietal to backs of thighs; 21-25 of largest dorsals equal length of head 



to back of interparietal plate; gular region blackish palmeri (p. 151) 



4. Dorsal scales from interparietal to rear of thighs 70-81 --squamata (p. 149) 

 Dorsal scales 82 or more 5 



5. No stripes whatever in dorsal pattern of either young or adults; dorsals 



92-117, generally more than 100 taylori (p. 150) 



Stripes present in young and some adults; dorsals larger or smaller 6 



6. No distinct dark blue blotch behind axilla raannophorus (p. 149) 



A distinct dark blue spot or blotch behind axilla 7 



7. Two rows of postrostrals; both internasals separated by 2 scales from 



rostral 8 



One row of postrostrals; one or both internasals separated from rostral by 

 only one scale 10 



8. Dorsal scales generally 17-23 in a head length (from snout to rear edge of 



interparietal) 9 



Dorsal scales generally 23-28 in a head length.stansburiana hesperis (p. 149) 



9. Size larger (64 mm. snout to vent) martinensis (p. 149) 



Size smaller (48 mm.) concinna (p. 150) 



10. Hind leg longer, 74-85 percent of body length, .stansburiana elegans (p. 148) 

 Hind leg shorter, 65-79 percent of body length. 



stansburiana stejnegeri (p. 150) 



UTA STANSBURIANA ELEGANS Yarrow 



Uta elegans Yarrow, Proc. U. S. Nat. Mus., vol. 5, 1882, p. 442. — Schmidt, 

 Bull. Amer. Mus. Nat. Hist., vol. 46, 1922, pp. 656-657. 



Uta stansburiana elegans, Van Denburgh, Occ. Pap. California Acad. Sci., No. 

 10, 1922, pp. 240-247 (part). 



