214 BULLETIN 160, UNITED STATES NATIONAL MUSEUM 



in having the tips of the fingers distinctly swollen. The following 

 notes were made on the type: Head-and-body length, 110.8 mm.; 

 transverse diameter of tympanum, 5.8 mm.; transverse diameter of 

 eye, 12.2 mm.; anterior edge of eye to nostril, 7.8 mm.; the hind limb 

 being carried forward along the body, the tibio-tarsal joint reaches 

 to between eye and end of snout; a prominent glandular fold from 

 postero-external angle of upper eyelid to shoulder, and its upper 

 branch is continued backward as narrow dorso-lateral dermal fold 

 to about level of middle of sacrum; no tarsal fold; skin of upperparts 

 covered with small pustules; minute sharp pointed asperities as well 

 as longitudinal rows of minute tubercles on upper surface of tibia; 

 vomerine teeth in oblique posteriorly converging rows, the apex of 

 which projects behind level of posterior borders of choanae; upper- 

 parts (in alcohol) olive, ^^^th indistinct dark spots; sides marbled 

 with dark and light; hinder side of thighs blackish, marbled with 

 gray; throat and chest with grayish suffusion; abdomen whitish. 

 Specimens examined. — One, the type. 



RANA TARAHUMARAE Boulenger 



1917. Rana tarahumarae Boulenger, Ann. and Mag. Nat. Hist., ser. 8, vol. 20, 

 no. 120, pp. 416, 417. — Boulenger, 1919, idem, ser. 9, vol. 3, no. 16, 

 p. 411. — Boulenger, 1920, Proc. Amer. Acad. Arts and Sci., vol. 55, no. 9, 

 p. 468, Aug. 



Type locality .—loquiro and Barranca del Cobre, Sierra Tara- 

 humare, State of Chihuahua, Mexico. 



Range. — Not known to occur elsewhere than in the Sierra Tara- 

 humare in western Chihuahua. 



Remarks. — Giinther based his description of this species upon 

 six cotypes, four of which came from loquiro [ = ? Yoquiva] and 

 two from Barranca del Cobre. The coloration of the upperparts 

 alone will distinguish this species from any other Mexican Rana. 

 The characters possessed by this frog indicate that it is an isolated 

 race of the boylii group. Boidenger correctly summarized the 

 relationships of this frog in the following words: "This species is 

 very closely allied to R. boylii, differing in the larger eye, the more 

 oblique loreal region, the more distinct tympanum, the shorter tibia, 

 and the absence of vocal sacs." Although the distributional limits 

 of this frog are unknown, it is clear that its range is isolated from 

 that of boylii by several well-defined barriers, of which the arid region 

 of southwestern Arizona and the Mohave Desert of California are 

 the most effective. 



These six cotypes of Rana tarahumarae are described in my notes 

 as follows: 



Four cotypes: B.M. Nos. 1911.12.12.36-39; loquiro [ = ? Yo- 

 quival. Sierra Tarahumare; Neilly, collector. Largest individual: 

 Head-and-body length, 78 mm.; transverse diameter of tympanum, 



