4 



prominent, a little longer than eye. Canthus rostralis obtuse, 

 slightly concave; nostrils subterminal. Discs of manus one-half 

 the diameter of the tympanic disc; those of the posterior foot 

 smaller. Skin of upper surfaces smooth; a fold from orbit over 

 tympanum to humerus. 



Measurements. Mm. 



Length of head and body 40 



Length to posterior border of membranum 



tympani (axial) 10 



Length of fore leg 20 



" " foot 11.5 



" hind leg 60 



" " " foot 27 



Color in spirits dull light purple to lead-color; probably 

 green in life. Inferior surfaces pale, gular region dusky. In 

 some specimens a dusky line extends from the nostril to the 

 middle of the side, and a few dusky spots are below it, posterior 

 to the axilla. In one individual the stripe extends nearly to the 

 groin and is separated from the darker shade of the back by a 

 pale band. Posterior face of femur either unicolor, or marked 

 by a few dusky reticulations. 



This species belongs to the same group as the H. labialis 

 Pet. and H. depressiceps Blgr. of the same region. From the 

 former it differs, among other points, in the shorter web of the 

 posterior digits and the shorter hind legs. The characters are 

 uniform in these respects in eight specimens of the H. vilsoniana. 

 H. depressiceps differs from the latter in the "very distinct tym- 

 panum," the "toes three-fourths webbed," and very much in the 

 coloration, according to Boulenger. 



I have dedicated this plant-loving species to my friend, 

 Professor William P. Wilson, Professor of Vegetable Physiology 

 in the University of Pennsylvania, and Director of the Philadel- 

 phia Commercial Museum. 



Eight specimens, Nos. 75, 76 and 78. 



Hylodes bogotbnsis Peters. Three specimens, No. 80. 



The form of the tongue varies in these specimens from 

 nearly discoid to an elongate oval. In the specimen with the 



