MEXICAN HERPETOLOGICAL MISCELLANY—SMITH 361 
An approximately similar comparison can be made of the total pore 
counts of specimens of the 2 subspecies. In m. calligaster the range is 
from 34 to 46, average 38.4, and 19.6 percent of the counts (46) are over 
40. In m. melanorhinus the range is from 37 to 538, average 42.8, and 
82.8 percent of the counts (29) are over 40. 
All counts available for the species were used in calculating percent- 
ages. The contrasts between the 2 races would be somewhat greater if 
specimens from certain central Guerrero localities (Mexcala, Tierra 
Colorada) were omitted as intergrades. The series available are not 
sufficiently large to demonstrate whether these localities actually are 
occupied by intergrading populations, and for this reason the question- 
able specimens were not omitted. It is noteworthy, however, that the 
occurrence of counts over 20 is greater there than elsewhere in m. calli- 
gaster. Subspecies of other species apparently intergrade also in this 
area: e. g., Uta b. bicarinata and b. anonymorpha,; Sceloporus h. hor- 
ridus and h. oligoporus. 
Le 
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17 / al 2 es 27 
Ficure 38.—Diagram showing range of variation in femoral pore counts of melanorhinus. 
The numbers on the vertical columns refer to the number of specimens, and those on 
the base line refer to the number of pores. The lines directed toward the upper right 
represent m. calligaster, while those directed toward the upper left represent m. melan- 
orhinus. ‘The cross-hatched area indicates the extent of overlap. 
2.—A NEW HORNED LIZARD FROM DURANGO 
A series of four specimens of Phrynosoma douglassii from the zoolog- 
ically poorly known Mexican state of Durango differs from all others 
of the species by having a much-reduced tail. These individuals are 
very different from the longer-tailed Phrynosoma orbiculare recorded 
from Chihuahua ® and Durango (EI Salto, U.S.N.M. No. 47469). They 
appear to belong to an unnamed race, for which I propose the name 
® Taylor and Knobloch, Proc. Biol. Soc. Washington, vol. 53, pp. 125, 126, 1940, 
