HYLODES. 229 
inner posterior angle of the choane. Back with prominent, linear, tubercular 
longitudinal folds or series of tubercles (sometimes as many as eight of these folds 
may be counted); skin between the folds, on the sides of the body, on the super- 
ciliaries, and on the non-concealed portions of the limbs, tubercular; abdomen 
granulated. Disks of the fingers absent, of the toes small. First and second fingers 
subequal in length; two metatarsal tubercles; a tarsal fold; subarticular tubercles 
continued on the metatarsals. Back between the two most prominent folds darker 
than the sides, on which the light colour forms an oblique band. Upper lip and 
limbs cross-barred: often a light line along the hinder side of the thigh. Lower 
parts whitish, with or without brown marbling. 
@ (Nicaragua). ¢ (Costa Rica). 9 (Costa Rica). 
Length of body . . . . . . . 26 millim. 24 millim. 31 millim. 
Distance between vent and heel . . 23 ,, 23 —C,, 3l ss, 
In specimens from Costa Rica the disks of the toes are rather more developed than 
in Nicaraguan individuals; but from a direct comparison of specimens from these 
localities, I come to the conclusion that the characters on which Cope has based 
H. steinegerianus do not hold good for specific distinction. 
4. Hylodes underwoodi. (Tab. LXVI. fig. D.) 
Hylodes underwoodi, Bouleng. Aun. & Mag. N. H. 1896, xviii. p. 340. 
Hab. Costa Rica, La Palma, alt. 1600 metres (Underwood). 
Habit moderate ; snout moderately obtuse, with obtuse canthus and _ slightly 
sloping, concave sides. Vomerine teeth in two oblique groups behind the choana, 
well separated from each other. Tympanum not quite the size of the eye, in adult 
females conspicuously smaller. Fingers and toes slender. with prominent subarticular 
tubercles which are continued on the metatarsals. Disks very small, quite incon- 
spicuous on the fingers. First and second fingers equal in length. ‘lwo metatarsal 
tubercles. The distance between vent and heel equals the length of the body. 
Upper parts rough with small tubercles; a pair of )(-like folds on the anterior half 
of the back, widely distant from each other; other similar folds on the posterior 
half are less distinct or constant; abdomen granular *. Upper parts brownish-black, 
with a bluish-white chevron across the anterior third of the back; or lighter-coloured, 
with darker markings, such as a dark triangular spot between the eyes, a lumbar spot, 
and cross-bars on the lips and limbs. MHinder side of the limbs nearly uniform 
brownish, with some minute marbling. 
Length of body . . . . . . . 2. ee ee) «680 millim. 
Distance between vent and heel. . . . . . . . +. 80 
3? 
* Mr. Boulenger describes it as smooth, but the granulation is distinct enough, and may be seen even in 
soft, badly preserved examples. . 
BIOL. CENTR.-AMER., Batr., August 1900. *30 
