128 U.S. NATIONAL MUSEUM BULLETIN 2 88 



one-half webbed, third toe shorter than fifth, which reaches just 

 beyond base of antepenultimate phalanx of fourth; first toe short but 

 distinct and fully webbed; no inner metatarsal tubercle; a small round 

 outer one; subarticular tubercles of toes single, moderately developed; 

 no tarsal ridge; a pronounced skinfold on heel and knee. Body rather 

 stout, in postaxillary region equal to greatest width of head. When 

 arm is adpressed, tip of third finger almost reaches to end of body; 

 when hind leg is adpressed, heel reaches to angle of jaw; when limbs 

 are laid along the side, knee and elbow touch; when hind legs are bent 

 at right angles to body, heels touch. Skin of upper parts pustular but 

 fairly smooth, the pustules deepest and most apparent on top of head, 

 sacrum, and along the sides; venter smooth; a round flat gland on side 

 well in front of and above the groin; a heavy bony ridge from posterior 

 corner of eye, ending above shoulder; no skinfold across chest; no 

 ventral disks; no apparent vocal sac in the male, but forearm probably 

 developed. 



Dimensions. — Head and body, 37.5 mm.; head length, 11 mm.; 

 head width, 9 mm.; femur, 14 mm.; tibia, 13.5 mm.; foot, 12.5 mm.; 

 hand, 9 mm. 



Color in alcohol. — Dorsum tawny olive, with small, indistinct sepia 

 spots on occiput and near dorsolateral line; snout, sacrum and most 

 of upper limb surfaces seal brown indistinctly marbled with a lighter 

 brown ; venter raw sienna, with 3 irregular longitudinal drab spots on 

 center of throat and chest; sides of body buff with many small russet 

 spots; a clove brown spot on gland just in front of groin; lips immacu- 

 late tawny ochraceous; can thai and upper loreal regions pale sepia; 

 palms and soles buff, with a wide sepia spot on outer metatarsal 

 region; no dark crossbars on upper femur or tibia, but instead a 

 heavy sprinkling of small dark brown spots. 



Remarks. — This form is in the group having the shortest legs, as its 

 adpressed heel reaches only to the front of the shoulder or to the angle 

 of the jaw. Its hand averages shorter than that of any other Colombian 

 form of Atelopus except spurrelli, and its head width averages less than 

 any except varius elegans. With so few examples, limits of variation 

 cannot now be determined. 



Specimens Examined 

 COLOMBIA 



Cundinamarca: Bogota, USNM 95177. 

 Magdalena: Santa Marta, 7,800 ft., ANSP 19749-8. 



Atelopus pedimarmoratus Rivero 



Plate 20g-i 



1963. Atelopus pedimarmoratus Rivero, p. 121, pi. 3, figs. 5, 8 (type locality, 

 San Isidro, Cundinamarca, Colombia). 



