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. 1873, p. 000. 



Snout broad, hardly as long as the diameter of the eye : lorcal 

 region ascending gradually : canthus rostralis rounded; tympanum 

 a little more than cue 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 Yalley, Colombia. 



7. Phyllobates verrucnlatus. 

 Phyllobates vemiculatus, Peters, Mon. Berl. Ac. 1870, p. GoO. 



Snout a little longer than the diameter of the eye, with rounded 

 canthus rostralis and vertical loreal region ; tympanum very 

 distinct, tss'o thirds the diameter of the eye. First linger shorter 

 than second ; disks of fingers m.oderate, 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. 180G, p. 131. 



Tongue broad, truncate. Snout projecting beyond jaw : canthus 

 rostralis strong ; loreal region oblique : tj'mpanum 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. 



