342 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



CHOEOPHILUS TEISERIATUS, Wied. 



Hyla triseriata Prince Maximilian Eeise in das inuere Nord-Amerika, i (1839), 249. 

 Heloooetes iriseriatus Baird, Proceed. Ac. Pliila., vii, 1854. p. 60. 



clarkii Baird, I. c, and U. S. Mex. Bound. Surv., Kept., p. 28, PI. 37, fig. 4-9. 



Chorophilus triseriatus Cope, Clieck-List N. Amer. Reptil., p. 30. 



— '■ — septentrionalis Boulenger, Cat. Batr. Sal. Brit. Mus., p. 335, 1882. 



Hylodes maciilatus Agassiz, Lake Superior, 1850, p. 378, vi, figs. 1, 2, 3. 



In general shape this species is more elongated and less squat than 

 H. feriarum, and the hind legs are materially shorter. The head is con- 

 siderably more pointed. The nostrils, being a little more in advance 

 than in Feriarum, are still over the end of the lower jaw, although tlie 

 projection of the upper jaw is greater than in the latter. The distance 

 between the anterior canthi of the orbits is more than half that between 

 the rami, and this latter distance less than the chord of either ramus. 

 The tympanum is small, less than half the diameter of the eye ; its an- 

 terior border on a line with the angle of the mouth. 



The granulation of this species is very distinct, extending over the 

 whole body, except on the interior faces of the hind legs. It is most 

 conspicuous and distinct beneath, and is seen on the under face of the 

 arms, especially evident in the palms of the hands. 



The tongue is rather thinner than usual in Feriarum and free for a 

 greater distance behind, less emargiuated posteriorly. The inner nares 

 are circular and nearer the anterior cauthus orbitalis than the external 

 nostril. The vomerine teeth are considerably within and behind the 

 centers of the posterior nares. The eyes about as in Feriarum. 



The fore-arm is a little longer than the hand. The arm from the 

 elbow is not so long as the hind foot. In general, while the thigh, leg, 

 and tarsus are shorter in proportion, the foot is as long as or even longer 

 than in Feriarum. The leg and thigh are nearly of the same length, and 

 about two-fifths the length of the body. When the hind leg is flexed and 

 applied along the sides, the tips of the toes reach only to the axillae. 

 The fingers and toes are much as in H. feriarum, though with all the 

 limbs, more slender. 



The ground color above and on the sides is of a light ash, in most 

 specimens striped with brown; beneath yellowish-white, with a few 

 scattered brownish dots on the sides and sometimes extending across 

 the breast behind the arms. There is no transverse baud between the 

 eyes, but, instead, an oval spot above each orbit, and between these a 

 distinct stripe starting between the nostrils and extending backwards 

 to about the middle of the back, where it bifurcates at a very acute 

 angle and continues, margining the urostyle, as it were, to near the anus. 

 On each side of this dorsal mark is a stripe of similar width, starting 

 in a line with the orbital blotches, but behind them and extending 

 nearly to the groin, having a slight curve outwards to retain parallelism 

 with the dorsal fork. A well-defined stripe starts at the snout and 

 passes backwards through the eyes and tympanum over the shoulder 



