AMPHIBIA AND REPTILIA OF COLORADO 59 



Range, eastern and southern United States, west through Nebraska 

 into the Northwest. 



Colorado specimens. — University Museum: Wray, October 26, 191 2 (2 

 specimens, 18-20 mm.), M. M. Ellis, No, 195. 



Genus HYLA Laurenti 

 Hyla Laurenti, Synopsis Reptilium, p. 32, 1768. 



This genus embraces more than half of the species of Hylidae and 

 is represented in all of the large faunal divisions. Most of the species 

 known are from AustraUa and the New World. The smgle species 

 Hyla arenicolor Cope is found in Colorado. 



Hyla arenicolor Cope 

 Arizona Tree Frog; Sand-Colored Tree Frog 



Hyla arenicolor Cope, Journ. Acad. Nat, Sci. Phila., p. 61, 1866. 



Head depressed and rounded anteriorly, its length about 3.5 in 

 the total length; length of the hind leg to the heel reaching forward 

 to the eye; first finger distinctly shorter than the second; male with 

 a gular sac; size medium, length two inches or less. 



Color variable and changeable; generally brownish gray to green- 

 ish, with numerous small rather round blotches of black (these spots 

 sometimes in two irregular rows) ; hind legs crossed by three poorly 

 defined dark bars; ventral parts roughened; throat dusky; belly 

 whitish; often with a light spot below each eye. 



Range, Utah and Colorado south into Mexico and west into 

 California. 



Colorado specimen. — State Teachers' College Museum: Mesa de Maya, Las 

 Animas County, 1886, A. E. Beardsley (det. A. E. Beardsley). 



Family Ranidae 



Genus RANA Linnaeus 

 Rana Linnaeus, Syst. Nat., ed. X, p. 354, 1758. 



Tongue free posteriorly, fastened anteriorly to the floor of the 

 mouth; upper jaw with teeth; fingers free, toes webbed. A genus 

 of cosmopolitan distribution, being the only one of this family found 



