2. PHRYNISCUS. 153 
tubercles. Hind limb moderate; the tibio-tarsal articulation marks 
the posterior corner of the eye in males, does not reach so far in 
females; toes rather short, first very short but distinct, nearly 
entirely webbed; no metatarsal nor subarticular tubercles. Skin 
quite smooth. ‘Tivo varieties of colour may be distinguished: in 
both the upper surfaces are black and the lower surfaces yellow; in 
the first variety the markings of the upper surfaces are crimson, in 
the other they are greenish yellow; these markings very variable, 
arranged in spots or in confluent symmetrical bands. Males (pro- 
bably of the second variety) greyish above dotted with black, the 
light markings black-edged ; an internal subgular vocal sac. 
C, America; Colombia. 
a—b. 9, var. 2. Costa Rica. Prof. Peters. 
ce. Many spec. (both va- Costa Rica. Messrs. Salvin and Godman 
rieties): 3, 9, & her. EPS 
d-e, 9, var. 1. Costa Rica. O. Salvin, Esq. [C.]. 
F-h, i-l. 3 Q, var. 2. Costa Rica. 
6. Phryniscus longirostris. 
Atelopus longirostris, Cope, Proc. Acad. Philad. 1868, p. 116; Espada, 
Viay. Pacif., Vert. p. 155, pl. 2. f. 1 & 2. 
varius, Bouleng. Bull, Soc. Zool. France, 1880, p. 46. 
Very closely allied to P. varius, from which it differs in the 
longer, more pointed, and more prominent snout, and the longer hind 
limb, the tibio-tarsal articulation marking the front of the eye. 
Above black; under surfaces and upper lip yellow; a greenish spot 
on each scapular region, and two or three pairs of the same on each 
side of the vertebral line. 
Ecuador, 
7. Phryniscus flavescens. 
Atelopus flavescens, Dum. § Bibr. p. 661. ; o 
spumarius, Cope, Proc. Ac, Philad. 1871, p. 222. * Pe 
twice and a half in females, scarcely more than twice in males, in 
the length of the trunk; sides of head vertical ; snout subacuminate, 
projecting ; nostril much nearer the tip of the snout than the eye; 
the diameter of the latter equals its distance from the nostril; 
interorbital space broader than the upper eyelid (as broad as the 
upper eyelid in one, male, specimen). ‘ore limb slender, a little 
longer than the trunk; fingers moderate, first very short, rudimen- 
tary ; no metacarpal nor subarticular tubercles. Hind limb rather 
slender, the tibio-tarsal articulation marks the posterior corner of 
the eye; toes short, first quite indistinct, one-third webbed; no 
metatarsal nor subarticular tubercles. Skin quite smooth. Bright 
yellow ; upper surfaces dotted and marbled with brown or blackish ; 
