550 REPORT OF NATIONAL MUSEUM, 1898. 



separated by the large tliiid iufralabial, which reachcis the lip border. 

 I do not remember any other lizard in which this occurs. In X. vigilis 

 there are five inferior labials in an uninterrupted series, the flftli sepa- 

 rated from the lip border by a scale. Infralabials six on each side, the 

 anterior three larger than the posterior three; the anterior pair in con- 

 tact on the middle line, the others separate. The auricular meatus is 

 nearly as large as the orbit, and has no processes on its anterior border. 



The dorsal and lateral scales are subround, smooth, and in trans- 

 verse series. They are subequal and measure about 0.33 mm. The 

 abdominal scales are much larger, are subquadrate and in transverse 

 rows. Each row includes fourteen (in the largest sixteen) scales. In 

 X. vigilis there are twelve and fourteen. Femoral pores ten (six and 

 seven in X. vigilis). Ten large scales in the gular collar. Preanals in 

 three series; two narrow series of four scales each in front, and a pair of 

 very large scales behind, each bounded by a much smaller scale at the 

 posterior outer angle. Scales of limbs rather uniform, larger on the 

 external surfaces, largest on the anterior and inferior faces, where they 

 nearly equal those of the belly, but have rounded borders. 



Measurements. — Total length (tail complete), 124 mm. ; length to vent, 

 50 mm,; total length to axilla, 23 mm.; total length to collar, 18 mm.; 

 total length to meatus auditorius, 11 mm. Length of fore leg from 

 axilla, 17 mm. ; of fore foot, 6.5 mm. Length of hind leg from groin, 25 

 mm.; of hind foot, 10 mm. 



Ground color, light pinkish-gray. This is overlaid by two dorsolat- 

 eral rows of large purj)lish-brown spots which are only separated by 

 narrow lines of the ground. The tail is marked by two similar rows 

 of smaller and more widely separated spots. Hind limbs closely, fore 

 limbs sparsely spotted. Head plates purplish-brown, with pale borders. 

 Inferior surfaces uniform yellowish. 



I have seen but one specimen of this species. It was sent me by Dr. 

 J. H. Rivers, of the University of California, to whom I am also under 

 obligations for the first specimens of the species next to be described. 

 Dr. Rivers states that the former specimen was taken at Tejon Pass, in 

 southern California. 



XANTUSIA RIVERSIANA Cope. 



Xantusia rirersiana Cope, American Naturalist, 1879, p. 801; Proc. Acad. Nat. 

 Sci.PhiLi., 1883, p. 29.— Boulengek, Cat. Liz. Brit. Mus., II, 1885, p. 328.— 

 RiVEKs, American Naturalist, 1889, p. 1100. 



The scales of the dorsal and lateral regions are rather coarsely and 

 uniforudy granular. The abdominal scales are quadrate, and are in 

 sixteen longitudinal and thirty-two transverse rows. The preaual 

 scales are in three transverse rows, the anterior two of four scales, 

 with the median pair in both much enlarged, and the posterior row of 

 six scales. Scales of the gular region fiat and hexagonal, one row on 

 the gular fold a little larger, and e(iual to the anterior gulars. Scales 



