68 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



pale and immaculate except for some brown spots on the lower aspect 

 of both tibiae and tarsi, and the dark tips to the toes and fingers. The 

 next example (19706) in the series grading from a light to a dark colora- 

 tion, is also pale in body color. Its nostrils are outlined with brown; 

 it has an unpaired brown spot on the posterior part of the right eyelid, 

 then a small median occipital brown spot, another slightly larger on 

 the median line between the shoulders, then no more dark pigment 

 except a small brown spot which occurs on the right side of the vent. 

 On the legs a heavy brown blotch appears on the right anterior face 

 of the femur, while the left anterior femur bears a smaller and paler 

 brown spot. No blotches appear on the posterior part of the femur in 

 this specimen. There is a heavy dark band across the left tibia, and a 

 small pale brown spot on the right tibia. The tarsi and feet are faintly 

 spotted with brown. The forearms each have a brown band, that on 

 the right the heavier. The ventral surface is immaculate, excepting the 

 toe- and finger-tips; even the lower surfaces of the legs are free from 

 spots. The next example (19707) in our series shows a considerable 

 widening of the bars on the legs, so that most of the femur is dark, and 

 the tibia has a wide dark median crossbar, while the tarsi are barred 

 and the soles of the feet are dark. In this specimen some of the tips 

 of the toes are pale. The skin of head and body is pale and immacu- 

 late, except for a large brown scapular blotch on the left shoulder only. 

 The ventral surface is immaculate except for the continuations of the 

 dark blotches on the legs and arms, and a dark patch at the insertion 

 of the arm. The other examples evidently represent older phases of 

 coloration. Some had a good deal of dark pigment appearing anteriorly 

 on top of the head, while the back is more faintly blotched with dark, 

 and the femur may be pale, crossbarred or dark. In some examples the 

 lower surfaces are heavily spotted, in others only faintly so. The 

 markings at this stage become more symmetrical also, and the dark 

 postanal patch appears in most of the examples. The adult frogs are 

 dark brown above, although a little of the original pale body color may 

 show between the bars on the legs and above the postanal patch on the 

 back of the femur. Some of the adults are more heavily spotted 

 ventrally than is the case in the type specimen, but the variation 

 among the adults is not as great as one might expect, considering the 

 asymmetry of the young. The three young examples taken by Dr. 

 Wetmore show the same peculiar asymmetry as do the young of the 

 type series just described. The example taken by Lt. Commander 

 S. S. Cook (U.S.N.M. 85009), belongs to the intermediate stage when 

 darkening of the skin is well under way. A field note with this indi- 

 vidual says that it was 'found under pine logs near the overnight 

 camp' and that when caught it was 'distinctly green in color.' 



"The heel in two of the four adult para types is like that of the type 

 in reaching the tympanum. The heels of the other two adults, as 



