416 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



mucronate caudal scales. There are about 114 scales in a line from 

 the posterior edge of the interparietal plate to a point above the pos- 

 terior surfaces of the thighs. Dorsal and anterior surfaces of fore 

 legs covered with keeled, imbricate scales, larger than those on the 

 rump. Scales on the dorsal and anterior surfaces of hind legs keeled, 

 imbricate, and larger than those on the fore legs; their posterior sur- 

 faces are covered with granules. Scales on throat flat; 36 in a 

 straight line from the symplryseal to the gular fold, inclusive. Gular 

 fold fringed with 17 bluntly pointed scales which are larger than the 

 gulars. Belly scales smooth, 69 in a line from the gular fold to the 

 anus. The ventral surfaces of the legs are covered with smooth 

 scales. Ventral surface of tail clothed with smooth, bluntly pointed 

 scales, which are smaller than those on the dorsal surface of the tail. 

 Femoral pores 15 and 16. Color (in alcohol): Head gray brown. 

 Dursum darker, with parallel rows of dark-brown blotches. Dorsal 

 surface of forelegs dark gray, spotted with lighter gray; hind legs of 

 a lighter color. A black post-axilla spot on each side. Throat blue, 

 spotted with white. Belly white. 



Measurements of type, male. 



TUTU. 



Length of head (to posterior edge of interparietal plate) 11 



Greatest width of head 9. 5 



Length, snout to anus 51 



Length of tail (regenerated) 58 



Fore leg 21. 5 



Hind leg 38. 5 



Longest toe from base of fifth to tip of fourth, including claw 17 



Status. — The form Tiesperis blends completely into elegans along the 

 Coast Kange, in Kiverside and San Diego Counties, and in the north- 

 western part of Lower California, Mexico. In San Diego County 

 almost typical elegans has been found at Pine Mountain near Escon- 

 dido and at La Puerta. The one specimen from Gorman Station, on 

 the edge of the Mohave desert, has 93 dorsal scales, and it seems prob- 

 able that Tiesperis intergrades with elegans in that region also. The 

 table on page 418 shows the range of variation in this subspecies. 



Specimens belonging to this form have been examined from the 

 localities listed below: 



