8. PHYLLOBATES. 197 
before and behind; abdomen and inferior surfaces of thighs and 
legs with a rosy or orange pigment. Male with a large rose- 
coloured vocal sac. 
Pico Blanco, Costa Rica. 
6. Phyllobates chalceus. 
Phyllobates chalceus, Peters, Mon. Berl. Ac. 1875, p. 609. 
Snout broad, hardly as long as the diameter of the eye; loreal 
region ascending gradually; canthus rostralis rounded; tympanum 
a little more than one fourth the diameter of the eye. First finger 
longer than second; no metacarpal nor metatarsal tubercles. The 
hind limb being carried forwards along the body, the tibio-tarsal 
articulation reaches the eye or the tip of the snout. Skin covered 
with small tubercles, smaller on the belly than on the back. 
Brownish yellow above, yellowish beneath. 
Pastassa Valley, Colombia. 
7. Phyllobates verruculatus. 
Phyllobates verruculatus, Peters, Mon. Berl, Ac. 1870, p. 650. 
Snout a little longer than the diameter of the eye, with rounded 
canthus rostralis and vertical loreal region; tympanum very 
distinct, two thirds the diameter of the eye. First finger shorter 
than second; disks of fingers moderate, of toes small; subarticular 
tubercles well developed; two small metatarsal tubercles. Upper 
surface of body with small warts; throat and breast smooth ; lower 
belly and inferior surface of thighs granular. Yellowish brown 
above, spotted and dotted with black; loreal and temporal regions 
blackish brown ; brownish yellow beneath, variegated with dark. 
Huanusco, Mexico. 
8. Phyllobates ridens. 
Phyllobates ridens, Cope, Proc, Ac. Philad. 1866, p. 131. 
Tongue broad, truncate. Snout projecting beyond jaw ; canthus 
rostralis strong ; loreal region oblique ; tympanum one eighth of orbit. 
Fingers and toes long, with well-marked disks. The hind limb being 
carried forwards along the body, the tibio-tarsal articulation reaches 
the tip of the snout. Lower surfaces closely areolate. Colour 
above greyish brick-red, with a grey cross bar between the eyes, 
and others across the hind limbs; lip with grey bars; a grey line 
on the canthus rostralis, and a black spot on the tympanum ; below 
pale brownish. 
St.-Juan River, Nicaragua, 
