116 U. S. NATIO>TAL MUSEUM BULLETIN 206 



distance from eye. Canthus rostralis not well defined; loreal region 

 slightly concave, nearly vertical. Eye quite large and prominent, its 

 diameter greater than its distance from tip of snout; interorbital 

 diameter equal to width of upper eyelid, considerably greater than 

 distance between nostrils. Tympanum fairly distinct but very small, 

 about one-third the diameter of eye, separated from eye by an interval 

 equal to about half its own diameter. Fingers one-third webbed, 

 fourth much longer than second and reaching to base of disk of third, 

 which amply covers the tympanic area ; no pronounced rudiment of a 

 pollex; toes three-fourths webbed, third and fifth subequal, disk of 

 fourth toe almost covering the tympanic area; a distinct projecting 

 inner but no apparent outer metatarsal tubercle; a very heavy and 

 distinct ridge along inner side of tarsus; no dermal appendage on 

 heel. Body somewhat elongate, in postaxillary region slightly 

 narrower than greatest diameter of head. When hind leg is ad- 

 pressed, heel reaches to anterior corner of eye; when limbs are laid 

 along the sides, knee and elbow touch; when hind legs are bent at 

 right angles to body, heels greatly overlap. Skin of upper parts 

 smooth; a very slight, short, glandular swelling above the ear taking 

 the place of a dermal ridge; skin of throat and chest smooth, of belly 

 coarsely granular, of thighs very finely granular. A slight skinfold 

 on sides of chest in front of axilla. A very large median external 

 vocal sac. 



Dimensions. — Head and body 27 mm.; head length 8 mm., width 

 9 mm.; femur 13 mm.; tibia 14 mm.; foot 12 mm.; hand 8 mm. 



Colo)' in alcohol. — Sides drab to olive; an opalescent white dorsal 

 area beginning at tip of snout, widening anteriorly to include the 

 upper eyelids, narrowing on the sacral region and ending in a point 

 above the anus; a dark-edged, elongate rectangular spot of olive 

 ground-color invading the center of this white area; upper limb sur- 

 faces including femur drab, with a small, brilliantly opalescent white 

 spot above each elbow, and a much larger white spot covering the 

 entire upper part of the tibia, the demarcation between white area 

 and ground-color emphasized everywhere by a dark line; ventral 

 surface clay color, belly slightly ochraceous. 



Color in life.- — An adult female, USNM 97353, was brought to the 

 laboratory at Manguinhos on January 23, 1935. During the night 

 it deposited eggs. On the following day these color notes were taken: 

 A median walnut brown patch on anterior part of back surrounded 

 by a larger olive patch in which there are some very small cream-color 

 dots. Below this is a lateral band of reddish walnut brown. A pair 

 of minute lemon spots on elbow. Femur brilliant Saturn red. Tibia 

 with an olive-and-cream patch above like that on the back. Tarsus 

 orange vermilion; webs and toes and also sole of foot brilliant scarlet 



