THE BATRACHIA OF NOllTH AMERICA. 333 



CHOROPHILUS ORNATUS Holbrook.* 



Cystignathus ornatiis Holbr., N. Amer. Herp., iv, p. 105, PI. 25. 



ChoroiMlus ornatus Boulenger, Cat. Batr. Sal. Brit. Mus., 26. ed., 1882, p. 33.3. 



ChoropMhis ocularis Daudiii, Cope, Bull. U. S. Nat. Mus., No. 17, 1880, p, 27. 



Muzzle and cautbus rostralis rounded ; the former projecting, but 

 short, not longer than diameter of eye ; external nares nearer the orbit 

 than the end of the muzzle; skin not areolated or roughened above; 

 toes without terminal knobs, distinctly webbed at the base, and with 

 well-developed subarticular tubercles; hiud legs short, heel only reach- 

 ing posterior edge of tympanum when extended. 



The head is rather short, and the anterior outline is a narrow oval. 

 The extremity of the muzzle projects beyond the mouth, and the lores 

 are slightly oblique and a little concave. The nostril is but little nearer 

 the extremity of the muzzle than the orbit. The vertical diameter of 

 the tympanum a little exceeds the transverse, which is one-half the long- 

 diameter of the eye-slit. The pupil, as in the other species of this 

 genus, is horizontal. The tongue is wide, discoid, and entire behind. 

 The ostia pharyngea are smaller than the small choana3. The vomerine 

 patches are short and transverse; they are entirely within the lines of 

 the inner borders of the choanne and behind the line of the posterior 

 holders of the same. 



The tubercles of the superior surfaces are small and rather closely 

 placed ; they are largest on the sides of the back. There is a faint areo- 

 lation of the gular region. The limbs are short and stout. The humerus 

 is half or more inclosed in the skin. The palm reaches nearly to the end 

 of the muzzle. The fingers are short and stout, and have neither dilata- 

 tions nor borders. The first is shorter than the second, which equals 

 the fourth. The palmar tubercles are not distinct. The heel of the ap- 

 pressed hind foot in thin specimens marks the middle of the tympanic 

 disk or posterior border of orbit, and the end of the muzzle the extremity 

 of the tarsus. The hind foot beyond the tarsus is only as long as the 

 tibia. The toes have no dilatations, but possess dermal margins, and a 

 short but distinct basal web. There is but one solar tubercle, a small 

 cuneiform prominence. Total length, .035'" ; of head, to line of posterior 

 borders of membranum tympaui, .Oil'"; width of head at the latter, 

 .014'" ; length of hind leg, .045™; of femur, .013'"; of hind foot, .022'"; of 

 tarsus, .009'". 



The color above is olive-gray, and below uniform straw-color. A 

 black band passes from the end of the muzzle on each side, through the 

 eye, aud, expanding over the ear-drum, terminates in front of the hu- 

 merus. One or two dark spots above and behind the axilla may unite 

 to form part of a lateral band. There may or may not be blackish spots 

 above the groin and on the pelvic region and anterior ])art of the back. 



~" ^ ~ * Plate 72, ti<r. 2. 



