106 U.S. NATIONAL MUSEUM BULLETIN 2 88 



Description. — USNM 144619, an adult male from Mitii, Vaupes, 

 Colombia. Heavy bony ridges on top of head. Parotoids very large, 

 triangular, twice the diameter of eye. Tongue about half as wide as 

 mouth opening, broadly ovate, its posterior border free and un- 

 notched; snout nearly truncate at tip when viewed from above, 

 truncate in profile, the upper jaw extending slightly beyond the lower. 

 Nostrils lateral, strongly projecting, their distance from end of snout 

 about one-third their distance from eye. Can thus rostralis strong; 

 loreal region concave, nearly vertical and in a line with the upper lip. 

 Eye large, prominent, its diameter 1^ times its distance from tip of 

 snout; interorbital diameter 1% times that of upper eyelid, much 

 greater than interval between nostrils. Tympanum distinct, its 

 greatest diameter one-half that of eye, separated from eye by an 

 interval equal to one-half its own diameter. Fingers fairly long, with 

 lateral ridges, free, first finger longer than second and equal to fourth, 

 both reaching beyond base of penultimate phalanx of third; a flat 

 oval thumb pad present; a large rounded palmar callus; metacarpal 

 tubercles well developed, the distal ones of the third and fourth fingers 

 double. Toes moderately long and one-third webbed, third toe longer 

 than fifth, its disk reaching halfway on antepenultimate phalanx of 

 fourth; a small semilunar metatarsal tubercle and a smaller flat, round 

 outer one; a very heavy tarsal ridge, ending near heel; a heavy skin- 

 fold on heel and knee; soles granular. Body stout, in postaxillary 

 region equal to greatest width of head. When hind leg is adpressed, 

 heel reaches nearly to shoulder; when limbs are laid along the sides, 

 knee and elbow are separated ; when hind legs are bent at right angles 

 to body, heels barely touch. Skin of upper parts granular, with large 

 spinose warts on each side of midline and toward the sides; bony 

 areas between eyes and near crests nearly smooth; venter finely 

 granular, with transverse folds on throat, abdomen, and lower femur; 

 a row of large tubercles along the sides behind parotoid; a heavy 

 glandular ridge from posterior corner of eye above tympanum, ending 

 at parotoid; no skinfold across the chest; no ventral disk; a median 

 external vocal sac in the male. 



Dimensions. — Head and body, 97.5 mm.; head length, 28 mm.; 

 head width, 36 mm.; femur, 37 mm.; tibia, 38 mm.; foot, 36.5 mm.; 

 hand, 25.5 mm. 



Color in alcohol. — Dorsum Vandyke brown, some of the tubercles 

 partly encircled by clove brown; a clove brown mark between the 

 eyes; upper limb surfaces seal brown, with indistinct darker marblings; 

 side of head sepia, upper lip wood brown, the crest along upper lip in 

 front of eye with seal brown dots; side of body vandyke brown fading 

 to clay color below, with many dark sepia spots; venter clay color, 

 with heavy sepia reticulations which become small and scattered on 



