196 PROCEEDINGS OF THE ACADEMY OF [1894. 



to whom I am indebted for the opportunity of studying the present 

 collection. 



Hylella chrysops sp. nov. 



Head short, wide, canthus rostralis wanting. Tongue a little 

 longer than wide, faintly emarginate ; ostea pharyngea each a trans- 

 verse slit. Tympanum not visible. Pupil a dumb-bell shaped 

 horizontal slit in the golden iris. Heel of extended hind limb 

 reaching to end of muzzle. The muzzle is as long as the diameter 

 of the eye, and does not project beyond the lips ; nostrils terminal. 

 The fingers are one-third webbed, the thumb free, and at least as 

 long as the short third (second) digit. Hallucal tubercle minute ; 

 pallets well developed. 



Color above and below yellow ; pigment more conspicuous on 

 edges of eyelids. No markings of any kind, except that one speci- 

 men is covered above with rather distinct, minute, black specks. 



Total length, 22 mm. ; length of head to canthus oris, 6 mm. ; 

 width at do., 8 mm. Length of anterior limb, 13.5 mm.; do. of 

 anterior foot, 6 mm.; do. of posterior limb, 36 mm.; do. of hind 

 foot, 15 mm.; do. of astragalo-calcaneum, 7 mm. 



No. 252, Alajuela, R. Alfaro ; 492, San Jose, P. Biolley. 



This small and brilliant species is related distantly to the H. plaiy- 

 cephala Cope, from the West Coast of Mexico. In that species the 

 canthus rostralis and the tympanum are well marked, and the size 

 is larger. 



Lithodytes euryglossus sp. nov. 



A large species with small pallets, in which the heel does not 

 reach the end of the muzzle, although it extends to a point anterior 

 to the eye. General appearance that of a LepfofJacfijlas. No dis- 

 tinct canthus rostralis ; end of muzzle sloping backwards from lip- 

 border. Tympanic disc a vertical oval, of which the long diameter 

 is two- thirds that of the eye. Nostril nearer the end of the muzzle 

 than its distance from the orbit. Tongue wider than long, openly 

 notched posteriorly. Choame moderate. Vomerine teeth in two trans- 

 verse series, on transverse ridges whose anterior borders are in line 

 with the posterior borders of the choaiue, and whose external borders 

 are a little within the internal borders of the choau;e. Ostia pharyn- 

 gea larger than choame. Pallets distinct but small, smallest on the 

 manus. Digits without dermal margins. First and second fingers 



