THE BATRACHIA OF NORTH AMERICA. 353 



the eyes nearly parallel to the anterior branches of the dorsal X . A dark 

 vitta from the snout through the eye down the sides, and a narrow 

 mottled light line along the jaw. 



Feet not webbed beyond penultimate articulation of third and fifth 

 toes and antepenultimate of the fourth toe. 



In its general features this species agrees with the other American 

 Hyl?e, except that the membrane between the toes is somewhat less de- 

 veloped, and the transverse apophyses of the sacral vertebrae are not 

 quite so much enlarged towards the tip. It forms an approach to 

 Chorophilus, but has, however, large pallets to the extremities. It is 

 still more removed from Acris. 



The head is acuminate-ovate anteriorly, with the muzzle projecting 

 well beyond the uj^per lip, and is contained a little over three times in 

 the total length. The tymxjanum is about half the diameter of the 

 eye and distinct. The tongue is very thin, subcordiform, rounded and 

 emarginate behind, where also it is free. It varies in size in different 

 individuals. The posterior nares are large, with the two groups of vom- 

 erine teeth approximated and arranged with their longer axis oblique, 

 anteriorly behind the center of the nares, and posteriorly entirely behind 

 their posterior borders. 



The fingers and toes are well developed. The hand is longer than 

 the fore-arm, and the two about equal or little longer than the hind 

 foot, but not quite as long as the tibia, which is contained about two 

 and a half times, or less, in the length of the body. 



The disks are large and conspicuous. There is no membrane at the 

 bases of the fingers, of which the third is longest, the fourth or outer 

 longer than the second. The heel of the extended hind leg reaches to 

 the middle of the eye. There are distinct tubercles beneath all the 

 joints of the hind feet, and the two at the base of the foot are well de- 

 veloped. 



The last three phalanges of the longest toe and the two last of the 

 rest are free from membrane, which is also nearly absent along the 

 inner edge of the antepenultimate phalange of the third toe. 



The skin above is smooth, with occasional low pustules. The abdo- 

 men and lower part of the thigh are very distinctly granulated, as is the 

 pectoral region and the chin to a less degree. Pectoral fold not promi- 

 nent. 



General color above, a x>ale grayish yellow with a dorsal X-shaped 

 cross of narrow lines; beneath yellowish-white. Thedorsal cross consists 

 of a short longitudinal median dark line, whose middle is a little anterior 

 to the middle of the back. Anteriorly this bifurcates acutely, sending 

 off branches which reach nearly to the eyes ; posteriorly, similar bifur- 

 cations, parallel in direction (sometimes nearly continuous) with the 

 first, extend on to the sides of the body. Halfway between the poste-. 

 rior fork and the auns there are two other lines meeting at an acute 

 angle and parallel to the branches of the posterior fork j ust mentioned. 

 1951— Bull 31 23 



