FROGS OF COLOMBIA — COCHRAN AND GOIN 429 



of disk of third, which covers nearly one-half the tympanum; a large 

 crescentic thumb pad present; a flat palmar callus; metacarpal 

 tubercles moderately developed. Toes long, very slightly webbed, 

 third toe much shorter than fifth, the disk of which reaches halfway on 

 antepenultimate phalanx of fourth; disk of fourth toe covering about 

 one- third the tympanum, smaller than that of third finger; a strong 

 oval inner metatarsal tubercle and a smaller outer one; a weak tarsal 

 ridge, ending midway to heel; a heavy skinfold on heel and knee. A 

 slight glandular swelling on flank above groin. Body elongate, in 

 postaxillary region a little narrower than greatest width of head. 

 When hind leg is adpressed, heel reaches center of eye; when limbs 

 are laid along the sides, knee and elbow are well separated; when hind 

 legs are bent at right angles to body, heels greatly overlap. Skin of 

 upper parts minutely pustular, with a few small granules on sacrum; 

 sides of body minutely granular; venter and lower surface of femur 

 coarsely granular; chest and chin nearly smooth; a heavy glandular 

 ridge from posterior corner of eye above tympanum and ending behind 

 it; a distinct skinfold across the chest; a ventral disk; a pair of lateral 

 internal vocal sacs in the male, visible externally as a pair of wrinkles 

 on each side of chin. 



Dimensions. — Head and body, 34 mm.; head length, 12.5 mm.; 

 head width, 12 mm.; femur, 14.5 mm.; tibia, 16.5 mm.; foot, 13. 5 

 mm.; hand, 10 mm. 



Color in alcohol. — Dorsum Mars brown, darkening to seal brown on 

 upper part of snout, and with some small, dark suffusions in lumbar 

 region; venter fawn color, immacidate; sides of body ecru drab, with 

 a clove brown stripe from posterior corner of eye, ending in a large 

 dark spot behind tympanum; sides of head fawn color, the can thus 

 with a seal brown stripe, and a few indistinct darker spots along upper 

 lip; anterior and posterior femur drab, immaculate; upper surface of 

 legs drab, with faint indications of two or three brown crossbars; 

 soles of feet and palms of hands fawn color, their disks slightly darker; 

 a round gland-like swelling in front of and above groin marked with 

 darker brown. 



Remarks. — In the series of 39 adults from La Selva, the dorsal 

 color in alcohol is usually slate-gray. Sometimes a darker middorsal 

 stripe appears, and, rarely, three or five narrow ones. The snout is 

 occasionally immaculate pearl gray, and sometimes a dark interocular 

 band occurs behind this light area. The venter may give a pepper- 

 and-salt effect of small gray dots thickly scattered on a pale ground. 

 The carmine or pink, when still visible, is concentrated in the groin, 

 extending often halfway to the axilla, and on the anterior femur in 

 a single large patch extending about two-thirds the distance to the 

 knee. The posterior femur and the inner tibia are largely pink, this 



