636 MR. G. A. BOULENGER ON [DeC. 18^ 



black, elegantly reticulated with grey. From snout to vent 1/ 

 millim. 



Closely allied to D, tinctorius. 



Several specimens, probably young. 



4. Dendrobates fantasticus, sp. n. (Plate LVII, fig. 3.) 



Closely allied to D. tinctorius and reticulatus, but differing from 

 the former by the longer limbs, the tarso-metatarsal articulation 

 reacliing beyond the tip of the snout, and from both by the belly 

 being granulate. Head to fore limbs above and below yellow ; 

 humerus above, and the borders of the yellow colour white ; the rest 

 of the body and limbs black, with wide-meshed grey reticulation. 

 Male with a subgular vocal sac. From snout to vent 20 millim. 



Four specimens, S 2 • 



5. Dendrobates trivittatus, Spix. 



The lines and other markings on the upper surfaces bright 

 yellow. 



6. Dendrobates hahneli, sp. n. (Plate LVII. fig. 4.) 



Snout truncate, as long as the diameter of the eye ; loreal region 

 vertical ; interorbital space broader than the upper eyelid ; tym- 

 panum iudistinct. Fingers and toes slender, the tips dilated into 

 small disks ; first and second fingers equal in length ; subarticular 

 tubercles feebly develojied ; two scarcely prominent metatarsal 

 tubercles. The hind limb being carried forward along the body, 

 the tarso-metatarsal articulation reaches beyond the tip of the snout. 

 Back slightly tubercular. Black ; limbs above blackish grey, black- 

 barred ; a narrow white line, turning to bright yellow near the loins, 

 on each side of the body, extending on the outer border of the upper 

 eyelid and the canthus rostralis to the end of the snout, where it 

 unites with its fellow ; a white line on the upper lip, from the ver- 

 tical of the anterior border of the eye to the arm ; a bright orange- 

 yellow spot at axilla, another on upper surface of femur near the 

 loin, and a third on inner surface of tibia near the femur ; belly and 

 lower surface of limbs marbled with grey. Male with a subgular 

 vocal sac. From snout to vent 23 millim. 



Allied to D. trivittatus. 



Several specimens, S 2 • 



7. Phyllobates trilineatus, sp. n. (Plate LVIII. fig. 1.) 



Snout obtuse, as long as the diameter of the eye ; loreal region 

 vertical ; nostril slightly nearer the tip of the snout than the eye ; 

 interorbital space broader than than the upper eyelid ; tympanum 

 concealed. Fingers slender, moderately elongate, first extending 

 beyond second, fourth extremely short ; toes slender, with rudiment 

 of web ; disks small ; subarticular tubercles feebly developed ; two 

 slightl_y prominent metatarsal tubercles. The hind limb being 

 carried forward along the body, the tibio-tarsal articulation reaches 

 centre of eye. Skin perfectly smooth. Dark brown above, limbs 



