70 University of California Publications in Zoology — | Vou. 17 
Mus. Dorsal seale 
No. Locality rows Remarks 
5396 Victorville, San Bernardino Co. 77 elegans 
5397 Victorville, San Bernardino Co. 79 elegans 
3580 Banning, Riverside Co. 91 intergrade 
90 Snow Creek, Riverside Co. or intergrade 
252 Palm Canon, Riverside Co. 97 intergrade 
491 Carrizo Creek, San Diego Co. 88 elegans 
1043 Warner Pass, San Diego Co. 86 elegans 
1585 Julian, San Diego Co. 90 intergrade 
986 Mountain Spring, San Diego Co. 91 intergrade 
3587 Imperial Valley, Imperial Co. 77 elegans 
NovTEs ON CALLISAURUS AND CROTAPHYTUS 
In his description of Callisaurus ventralis myurus, Richardson 
(1915, p. 410) gives the range of this new form, doubtfully, as ex- 
tending as far south as Owens Valley, in California. The darkest of 
ten specimens in the Museum of Vertebrate Zoology from Keeler, Inyo 
County, are not different in color from individuals collected at Barstow 
on the Mojave desert in San Bernardino County. The average number 
of femoral pores in this series is 14.3 and the average ratio of tail 
to body length .737, thus agreeing with Richardson’s determination 
of .727 for C. v. ventralis from the Colorado desert, and differing from 
the average of .807 given for myurus from Pyramid Lake, Nevada. 
Since Callisaurus does not seem to range north through Owens Valley 
into Mono County, specimens from the former region are not in what 
could be considered an area of intergradation between ventralis and 
MYUrUs. 
It should be noted that the provisional assignment of the Death 
Valley Callisaurus to myurus on the basis of Merriam’s notes is a 
mistake, since the Callisawrus of which Merriam speaks pertained to 
Desert Valley, east of the Pahroe Mountains, Nevada (Stejneger, 1893, 
p. LT). 
It is interesting to add that Richardson’s discovery of a decrease 
in tail length and number of femoral pores in the more northern forms 
of widely ranging species of lizards can be confirmed upon a study 
of Crotaphytus collaris baileyi and Crotaphytus wislizenii. Ten ex- 
amples of the former species in the Museum of Vertebrate Zoology 
from Humboldt County, Nevada, have an average ratio of body length 
to tail length of .549 (minimum .521) and an average of 16 + (maxi- 
mum 19) femoral pores. Eight specimens of baileyi from southern 
California have an average ratio of body length to tail length of 476 
