1883.] MR. BOULENGER ON FROGS FROM NORTHERN PERU. 635 



3. On a Collection of Frogs from Yurimaguas, Huallaga 

 River, Northern Peru. By G. A. Boulenger, P.Z.S. 



[Eeceived December 6, 1883.] 



(Plates LVIL, LVIII.) 



An interesting collection of Frogs, made at the above locaHty by 

 Dr. Hahnel, adds considerably to our fragmentary knowledge of the 

 Batrachian fauna of North-eastern Peru. It contains examples of 

 18 species, 8 of which are new. Examples of the new and of some 

 of the rarer known forms have been secured for the British Museum. 

 The specimens having been deposited in very weak spirit and pro- 

 tected from the hght, the coloration is wonderfully well preserved. 



1. Prostherapis femoralis, sp. n. (Plate LVII. fig. 1.) 



Snout depressed, projecting, truncate, with angular canthus 

 rostralis and vertical loreal region ; nostril nearer the tip of the 

 snout than the eye ; interorbital space broader than the upper 

 eyelid ; tympanum perfectly distinct, half the diameter of the eye. 

 First finger longer than second ; toes with a slight rudiment of web ; 

 disks of fingers and toes small ; subarticular tubercles small ; two 

 very small metatarsal tubercles. The hind liinb being carried for- 

 ward along the bodv, the tibio-tarsal articulation reaches the posterior 

 border of the eye. Skin tubercular above. Blackish brown above, 

 limbs lighter and marbled with darker ; a narrow white line 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 is con- 

 tinuous with its fellow ; a second parallel white line on the flanks ; 

 a third on the upper lip, from below the nostril, extending to the 

 arm ; lower surface of arm and base of same, and an oblique band 

 on inner half of upper surface of femur, bright yellow ; throat and 

 l)reast blackish brown ; abdomen and lower surface of hind limbs 

 brown- and white-marbled. From snout to vent 27 milhm. 



Two specimens, c? ? . 



Closely allied to P. imjuinalis, Cope ; distinguished by the dis- 

 tinct tympanum and the coloration. 



2. Ph^llodromus pulchellus, Espada. 



3. Dendrobates reticulatus, sp. n. (Plate LVII. fig. 2.) 



Snout truncate, longer than the diameter of the eye ; loreal region 

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

 panum scarcely distinct, half the diameter of the eye. First finger 

 not extending so far as second ; disks of fingers large, truncate, of 

 toes smaller; subarticular tubercles feebly developed ; two scarcely 

 distinct metatarsal tubercles. The hind limb being carried forward 

 along the body, the tarso-metatarsal articulation reaches a little 

 beyond the tip of the snout. Skin smooth. Upper surface of head, 

 back to sacrum, and a spot on the chin, pink ; tlie rest of tlie animai 



