25. CHARINA 643 



Description. Top of head very slightly rounded, 

 covered with plates which vary in size, shape and relations. 

 Usually a large frontal, bordered on each side by two supra- 

 oculars and behind by a broad crescent-shaped plate. Usually 

 three pairs of plates, with or without one or more small 

 azygous plates, between frontal and rostral. Loreals vari- 

 able. Labial plates sometimes entering orbital ring, anterior 

 labials very high. Scales on body smooth, imbricate, about 

 as wide as long, and arranged in 41 (or perhaps 43) longi- 

 tudinal rows, lowest row in each side being formed of larger 

 scales. Gastrosteges rather narrow and ranging in number 

 from 202 to 210. Urosteges in one series of from 33 to 39. 

 Anal spurs small. Tail very short and nearly as blunt as 

 head. 



All the upper surfaces are yellowish brown or olive, 

 without dark or light markings. The chin and throat usually 

 are clouded with gray or brown. The other lower surfaces 

 are light yellow. 



Length to anus 213 392 4-55 480 535 



Length of taiL._ 28 61 59 60 70 



Remarks. This subspecies differs from C. b. bottce in 

 the number of scale-rows. These are 41 in eight specimens 

 from Utah and three from Idaho. One specimen from Cody, 

 Bighorn County, Wyoming, and another from Chico, Park 

 County, Montana probably should be referred to this sub- 

 species, although each has 43 rows of scales. 



Distribution. In Utah, this boa has been found in 

 Wasatch (Little Cottonwood and Provo canyons in the Wa- 

 satch Mountains), Cache (12 miles up Logan Canyon), 

 and Salt Lake (Fort Douglas) counties. 



In Idaho, it probably is this subspecies which has been 

 collected at Blue Lake and in Hood's Valley, Kootenai 



