608 



THE AMERICAN NATURALIST [Vol.XLVI 



Canyon of the Colorado, Arizona, at an elevation of 

 1,000 feet above the river and in the bottom of the 

 ca. von. Kuthven's 6 specimens from Sabino Canyon, 

 Santa Catilina Mountains, Arizona, were * 'found among 

 bushes on the floor of the canyon" in the "willow-poplar 

 association." 



TABLE B 



f Mexico and Chihuah 

 co or Toiuca Mexico 



Kl P:tM,. Texas 



Santa IV, New Mexico . . . 

 1'Wt Win-it... \™ Mexie 



Witmer Stone 



Grand Canyon of the C 

 Whipple, Arizona 

 > Canyon, Santa 



Southern California . . . 



Specimens of Hyla arenicolor from southern Cali- 

 fornia agree quite closely with the published descrip- 

 tions. Cope 7 states that the diameter of the tympanum 

 is equal to two thirds that of the eye fissure, but in ten 

 specimens measured (see following table) this ratio is 

 shown to be 47.7 per cent., or not quite one half. Boulen- 

 ger's Hyla copii 8 described from two specimens obtained 

 at El Paso, Texas, and now considered synonymous with 

 Hyla arenicolor, has the diameter of the tympanum one 

 half that of the eye fissure, a fact which suggests that this 

 character is subject to considerable variation throughout 

 the range of the species. The ratio between the length 

 of the body and that of the hind limb is also subject to 



•Bull. Am. Mus. Nat. Hist., 1907, p. 509. 



T Bull. U. S. Nat. Mus., 1889, No. 34, pp. 369-370. 



