144 DENDaOBAIID^. 



Disks of fingers mucli larger than the tympanum. Skin quite 

 smooth. Greyish or vermilion-red, with or without smaU dark 

 markings on the back ; all four limbs black. 

 Central America. 



3. Dendrobates trivittatus. 



Hylaplesia piota, Giinth. Cat. p. 125. 

 Hyla trivittata, Spix, Spec. Nov. Test. Ran. p. 35, pi. 9. f. 1. 



niserrima, Spix, I. c. p. 36, pi. 9. f. 2. 



Dendrobates nigerrimus, Wagl. Syst. Amph. p. 202; Steindaehn. 

 Verh. mol.-bot. Ges. Wien, 1864, p. 257, pi. 13, f. 2. 



trivittatus, Waql. I.e.; Peters, Mon. Berl. Ac. 1872, p. 213; 



Cope, Froc. Ac. Philad. 1874, p. 129. 



Hylaplesia picta, Tschudi, Bat?-, p. 71. 



Dendrobates obscurus, Dum. S/- Bibr. p. 655 ; Guichen. An. Nouv. 

 Amir, merid. p. 87, pi. 18. f. 2. 



pictus, Dum. 8^ Bibr. p. 656 ; Guichen. in Gay, Hist. Chile, 



Zool. ii. p. 119. 



Snout truncate, a little longer than the diameter of the eye ; 

 loreal region vertical ; interorbital space broader than the upper 

 eyelid ; tympanum more or less distinct, about half the diameter of 

 the eye. Fingers slender, first extending slightly beyond second ; 

 toes slender ; tips of fingers and toes dilated into small disks ; sub- 

 articular tubercles distinct ; two scarcely prominent metatarsal 

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

 the tarso-metatarsal articulation reaches far beyond the tip of the 

 snout. Back tubercular; a scarcely prominent glandular lateral 

 fold. Black above and below. Male with a subgular vocal sac. 



Tropical America. 



The following specimens belong to three varieties of coloration ; — 



A. Uniform black. 

 a. $ . Brazil. 



B. A whitish line along the side of the back, the outer edge of 

 the upper eyelid, and the canthus rostralis, confluent with its 



-fellow on the end of the snout; another whitish line on the 

 upper lip, commencing from the vertical of the front edge of the 

 eye, extending to the arm ; sides, belly, and lower surface of 

 limlDS with whitish npots. 



h. c? ■ Demerara. 



c. 5 . Vryheids Lust, Demeraia. W. T. Turner. 



d. 2 ■ Suriuam. Mr. Bartlett [C.l 



e. (S . Sminam. Ilr. Kappler [O.j. 

 f-g. S- Para. 



h. 9 . Cayaria. "W. Davis, Esq. rc.l Messrs. 



Veitch [P.]. 



C. Forehead whitish ; three whitish streaks along the back, the 

 two outer continued on the upper surface of the hind limbs ; a 

 whitish line on the upper lip, as in var. B ; loins and axiUa 



