348 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



CHOEOPHILUS OCULAEIS Holbrook. 



Boulenger, Cat. Batr. Sal. Brit. Mus., 1882, p. 333. 



Hylodes ocularis Holbrook, N. Amer. ReviJ. 1st ed., ii, 79, PL xiv, 1838; and 2d ed., 



IV, 1842. 

 Hyla ocularis Le Conte, Proceed. Ac, Pbila., 1854, p. 439.- 

 Chorophilus angulatus Cope, Cbeck-List Batr., Reptil., N. Amer,, 1875, p. 30. 



Eyes large; head acute; lower jaw narrow; tibia rather more than 

 half length of body, decidedly longer than hind foot ; terminal knobs 

 well developed. Above chestnut, with an obscure darker dorsal band 

 from snout to eye, bifurcating behind, and another on each side. These 

 usually more or less obsolete; a much decider dark chestnut vitta from 

 snoutthrough eyeand tympanum, along the sides; belowthis is a distinct 

 white line; a light line along the outer edge of the tibia. 



This species, which appears to be the smallest of the genus, and in- 

 deed the smallest of all the North American ecaudate Batrachia, has a 

 close generic relationship to the other species. Its most striking features 

 will be found in the large size of the eyes, the acuteness of the head, 

 the small tongue, etc. Tlie tibia is longer than in any of the genus. 



The head is more pointed than usual, a character best seen in the 

 lower jaw; which, instead of being regularly ronnded, has the rami 

 nearly straight for two-thirds, then acutely rounded, almost V-shaped. 

 The tongue is small, ovate, entire behind, and free for half its length. 

 The vomerine teeth are not distinguishable. The tympanum is very 

 small, scarcely perceptible, and less than half the diameter of the eye. 



The limbs are well developed, compared to the other species. The 

 tibia is rather more than half the length of the body. 



General color above dark chestnut, with an obscure dorsal stripe of 

 darker from the snout to the posterior portion of the back, bifurcating 

 behind. On each side of this is a similarly obscure stripe, while a much 

 deeper and more distinct stripe extends along the side of the head, 

 through the eyes, and along the flanks. Below this, on the edge of the 

 upper jaw, is a white line, extending beyond the shoulder. Beneath 

 yellowish-white, with obscure dark spots across the breast and chin. 

 Faint indications of transverse bands across the thighs and legs, more 

 decided than in the other species. The outer edge of the tibia is occu- 

 pied by a distinct light line, on the inside of which is a darker mottling. 



In general it is distinguishable from all the allied species by its acute 

 lower jaw, chestnut color, and light line down the outer edge of tibia. 



Measurements, in inches. 



Totallength 64 1.00 



Tibia 33 .51 



Femur 30 .47 



Hind leg; from heel .46 .72 



Hindfoot 26 .40 



Hiudleg 1.09 1.70 



Width of lower jaw 18 .28 



Chord 21 .33 



ifo. 3585; 3 specimens; Charleston, S. 0.; C. Girard. 



