1894. 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



591 



separated from the frontal by a double row of grauules. Other dis- 

 crepancies will be noticed in the list of specimens given below. 



The males have enlarged postanal scales. 



The individual differences of coloration consist mainly in the outline 

 and intensity of the dusky cross-bars, while the black collar is equally 

 distinct in all. 



The sexes are alike in color, except thatt he blue tiank-patch is^ some- 

 what darker and wider in the males. 



Comparison icith Uta thalassiita. — Although closely allied to Utti 

 thalassina, described in 1803 by Prof. Cope from specimens collected 

 at Cape iSt. Lucas, the present species differs in many essential points, 

 most of whicli have been indicated in the diagnosis. 



In addition to these it may be remarked that the granules on the 

 back are larger in Uta mearnsi, but that the ventral scales are smaller; 

 it lacks the well-defined anterior gular fold of U. thalassina ; the legs 

 and tail are comparatively longer, and the femoral pores are more 

 numerous; each of the latter, moreover, is bordered behind by two 

 granules, while in U. thalassina there are three. The last mentioned 

 species appeals also to be much the larger, as the specimens collected 

 by Dr. Mearns seem to be quite adult. 



The most striking differences, however, are the long preauricular 

 spines and the large, strongly keeled, and spinous caudal scales of Uta 

 mearnsi, together with the absence of the two posterior dorsal black 

 bands so characteristic of U. thalassina. 



Geographical distribution. — Dr. Mearns found this species "extremely 

 plentiful" among the rocks on the eastern slope of the Coast Range of 

 California, near the Mexican boundary line, from the lowest water in 

 the canyon at the base to the summit. So far this is the only locality 

 where it is known to have been taken. I would suggest, however, that 

 it was most i^robably this species which Mr. Lockington has recorded 

 from Ensenada, Todos Santos Bay, Lower California, 7o miles south 

 east of San Diego {Amer. Natural.., 1880, \). 295), as Uta thalassina. 



List of spectinena. 



Catalogue 



number 



TJ.S.N.M. 



21882 

 21883 

 21884 

 21885 

 21886 

 21887 

 21888 



Sex. 



Female . . 

 Female . . . 

 Female . . . 

 Female . . . 



Male 



Male 



Female . . . 



Locality: Coa.st Range, California, near 

 the Mexican boundary. 



Summit of range 



Mountain Spring, eastern slope. 



Eastern base 



do 



Mountain Si)ring, eastern slope. 



do 



Lowest water, eastern base 



Supra- 

 labials. 



6 



5-6 



5 



5 



5-« 



" Tail reproduced. 



