BARBOUR AND NOBLE: AMPHIBIANS FROM PERU. 401 



largely upon the published descriptions. In the preparation of this 

 key certain species have been found to be certainly synonymous with 

 others. Prostherajns equatorialis Barbour is referable to Eleuthero- 

 dadylus unistrigatus (Giinther), Prostherapis herminae Boettger to 

 PhyUobafcs trinitatus Garman, Prostherapis variahilis Werner to 

 PhyUobatcs suhpunctahis Cope, and Phyllobates {Hypodidyon) 

 palmatus Werner to Syrrhophus palmatus Werner. 



Key. 



A. Flash colors of red or yellow on the axilla and inguinal or femoral 

 regions; dorsal surface of head and body distinctly glandular. 

 B. First finger longer than second. 



C. Flash colors yellow femoralis (Boulenger). 



CC. Flash colors pink ing^iinalis (Cope). 



BE. First finger not extending beyond second. 



C. Ground-tone of back lemon-yellow tricolor (Boulenger). 



CC. Ground-tone of back brownish grey festae (Peracca). 



AA. No flash colors; dorsal surface of head and body not distinctly glandular 

 although sometimes tubercular. 

 B. Lower surfaces of adult white, immaculate. 



C. Tibiotarsal articulation not reaching beyond tympanum. 



vertebralis (Boulenger) . 

 CC. Tibiotarsal articulation reaching to eye. 



D. Skin with numerous low, glandular warts, tympanum concealed. 



briinneus (Cope). 



DD. Skin smooth or with scattered tubercles, tympanum indistinct. 



E. T\Tnpanum one half diameter of eye; tibiotarsal articulation 



reaching barely to eye latinasus (Cope) . 



EE. Tympanum one third diameter of eye; tibiotarsal articulation 

 reaching to middle of eye or beyond. 



sylvatica Barbour & Noble. 

 BB. Ventral surface of adult brown or spotted with dark tones. 



C. A dark bar, two dark spots or a dark wash spotted with white on 

 the chest. 

 D. A dark bar across the chest, anterior part of belly generally of 



same dark tone trinitatus Garman. 



DD. No dark bar across chest. 



E. Throat and breast mottled with greyish brown. 



kingsburyi Boulenger. 

 EE. Ventral surface dark, spotted with white, sometimes only two 

 greyish spots on chest. 

 F. Black above, spotted with white on sides. 



alboguttatus Boulenger. 



