1887.] "*♦ [Cope. 



traded at the suprascapular region, leaving a wide band of the paler 

 ground color between it and a black line posterior to the eye. A very- 

 convex crescent-shaped area extends forwards from the posterior parts of 

 the iliac region on each side, presenting a convexity forwards on the 

 sacrum. Lips, sides, humerus and femur thickly dusted with brown, and 

 ■without other spots or marks. Fore-arm and tibia with dark-brown cross- 

 bars ; on the latter narrow, and four in number. A pale border on exter- 

 nal edge of foot from heel. Inferior surfaces cream-colored, immaculate. 



M. 



Length of head and body 033 



" " " to posterior line of tympana 0068 



Width " " at " " " " 0084 



Length of fore leg 014 



" " foot 006 



" hind leg 0385 



" " foot 017 



" " " " less tarsus 009 



There is a good deal of affinity between this species and the last. The 

 differences are as follows : In H. velata the posterior legs are longer, and 

 the manus is less palmate. There are no dermal borders on the limbs. 

 The femur is unspotted, and the black color so conspicuous in the H. me- 

 lanargyrea is absent. The dimensions are strikingly difierent, the species 

 just named having nearly twice the linear measurements of the E. velata. 



Four specimens. 

 5. Hyla nigra, sp. nov. 



Habit moderately slender ; heel reaching end of muzzle. Length of 

 head to posterior borders of tympana, enters length of head and body 

 three times. The urostyle and pelvis are rather short, the former equaling 

 the length of the head to the line of the posterior border of the orbits. 

 The muzzle is slightly acuminate when viewed from above, and project- 

 ing beyond the mouth in profile. The canthus rostralis is concave, 

 and the orbit is just as long as the muzzle. Nostrils subterminal. Tym- 

 panic drum round, one-fourth the diameter of the orbit, and bounded 

 above by a dermal fold. Vomerine teeth in two fasciculi between the 

 nares, their posterior edges a very little behind the borders of the latter. 

 Tongue subround, with an open notch in the free border. 



Digits of manus entirely free ; the fourth quite long, and the fifth ex- 

 ceeding the third in length. Second digit opposed to thii-d. Dilatation of 

 fourth digit just fitting within border of tympanic disc. Toes webbed to 

 the dilatations of the second, third and fifth digits, and to the base of the 

 antepenultimate phalange of the fourth and first. 



Skin with numerous short longitudinal and not very prominent warts 

 on the superior surfaces of the head and body. No distinct axillary mem- 

 brane. 



Superior surfaces uniform black. Gular region, inferior surface of 



