382 



REPORT OF NATIONAL MUSEUM, 1898. 



head above to tail, and about sixty-five around the body. They become 

 smaller from the back to the sides, where they scarcely if at all exceed 

 the belly scales. Abdominal and gular scales slightly notched at apex. 

 The extended hind leg reaches to the orbit. 



The ground color of this species above is a light olivaceous-gray with 

 ten dorsal series of about ten round blotches, bordered behind by a 

 lighter shade of the ground color. These blotches are three or four 

 scales wide. There are faint indications of a lateral series of the same 

 spots, but without any intervening light line. The hinder part of the 

 thigh shows two blackish lines. There is a small blackish spot on the 

 shoulder and another above it, but no indication of a collar. This 



Fig. 61. 

 SCELOPOBUS BISERIATUS HALLOWELL. 



xi. 



Utah. 



Cat. No. 8619 U.S.N. M. 



region and that of the groin show a few light yellowish spots. The 

 sides of the belly and the under surface of the head are blue, the latter 

 with the blue posterior, and anteriorly with a median light line and 

 scattered spots. In old males the throat, middle of belly, and inferior 

 side of femur may be black. 



This species is quite well marked, and is not likely to be confounded 

 with any others from the West, excepting, perhaps, 8. undulatns. In 

 this it differs in the larger size and the smoother and smaller scales, as 

 well as in the plates of head, and the hexagonal shape and SDioothness 

 of the smaller supraoculars. Its limbs are longer, greatly exceeding in 

 this respect S. undiilatus. 



