122 U.S. NATIONAL MUSEUM BULLETIN 2 88 



any reduction in toes 1, 2, 3, and 5, with the resulting prominence of 

 toe 4 — characters which are exceedingly obvious in the Cauca frog. 

 The described specimen was the only one examined. 



Atelopus ebenoides ebenoides Rivero 



Plate 18d-f 



1963. Atelopus ebenoides Rivero, 1963c, p. 3, pi. 3, figs. 6, 9 (type locality, 

 Paramo de las Papas, 3,600 m., San Agustm, Huila, Colombia). 



Description. — CNHM 69746 (holotype), an adult female from 

 Paramo de las Papas 3,600 m., San Agustin, Huila, Colombia. Head as 

 long as broad, its length a little more than one-fourth that of head and 

 body; tongue very long and narrow, one-third as wide as mouth opening, 

 its posterior border free and unnotched; snout nearly truncate when 

 viewed from above, truncate in profile, the upper j aw extending only 

 slightly beyond the lower. Nostrils lateral, scarcely projecting, their 

 distance from end of snout about one-half their distance from eye. Can- 

 thus rostralis rounded but prominent; loreal region deeply concave, 

 sloping steeply outwards to the upper lip. Eye large, prominent, 

 its diameter nearly as great as its distance from tip of snout; inter- 

 orbital diameter V/ 2 times that of upper eye lid; equal to interval 

 between nostrils. Tympanum indistinct posteriorly, its greatest 

 diameter about two-fifths that of eye, separated from eye by an 

 interval equal to three-fourths its own diameter. Fingers moderately 

 long, with thick lateral ridges, webbed at the base, the tips of all 

 digits bulbous, first finger much shorter than second, fourth longer 

 than either and reaching to base of last phalanx of third; a flat oval 

 thumb pad present; a large round palmar callus; metacarpal tubercles 

 weakly developed. Toes rather short, nearly completely webbed, 

 excepting the distal part of fourth toe, third and fifth toes subequal, 

 their disks reaching to center of antepenultimate phalanx of fourth 

 toe; a small oval inner metatarsal tubercle and a smaller round outer 

 one; a very faint tarsal ridge, ending near heel; a heavy skinfold 

 on heel and knee. Body rather stout, in postaxillary region equal to 

 greatest width of head. When hind leg is adpressed, heel reaches 

 front of shoulder; in the adpressed arm, tip of third finger just reaches 

 to end of body; when limbs are laid along the sides, knee and elbow 

 are slightly separated; when hind legs are bent at right angles to 

 body, heels are separated. Skin of upper parts thick, with many low 

 round warts from level of shoulders backwards, extending onto the 

 sides and becoming larger; venter pustular and slightly granular, 

 with small tubercles on throat, chest, and posterior femur; a heavy 

 bony ridge from posterior corner of eye extending straight back and 

 ending in a small knob behind the tympanum; a pair of bony arc- 



