268 U. S. NATIONAL MUSEUM BULLETIN 206 



belly; lower surface of limbs dark drab-gray, A young specimen taken 

 at the same time was olive-gray to oJive-buff above, tinged with buff 

 behind axilla, with small irregular slate-colored spots. The lower 

 surface was immaculate pale olive-buff. 



Variations. — Two examples from Petr6polis do not differ from the 

 Tijuca specimens. They have the same interocuiar light spot, the 

 same degree of webbing on the toes and a similar slightly granular to 

 smooth dorsal skin. 



While the described specimen has a distinctly granular dorsal skin, 

 these Tijuca specimens show a variation from moderately granular to 

 perfectly smooth. It appears therefore that the character of smooth 

 or granular sldn is of little value when applied to this particular form. 



The adpressed heel of USNM 81144 and of one other individual 

 reaches only to center of eye; on the remaining specimens the heel 

 reaches to the anterior border of the eye. The web is slightly variable 

 in extent, being sometimes distinctly incised from the outer toe to 

 where it joins the fourth toe, at other times nearly straight across. 



The series of adult and semiadult specimens at hand is not sufl&cient 

 to give a complete picture of the actual limits of variation. 



Remarks. — This species is easily confused with, fulginosus but it may 

 be separated on the basis of its much shorter hand, foot, femur, and 

 tibia, and the adpressed heel not reaching beyond the eye, whereas 

 in the other species the heel extends beyond the tip of the snout. 

 The webbing of its foot is also less extensive. 



Specimens examined 



BRAZIL: 



DisTRicTO Federal: Rio de Janeiro, USNM 81144, A. Lutz, June 1930; 

 USNM 96376 (eggs), A. Lutz, October 1929. Manguinhos, IB 118; USNM 

 121319. Pico de Tijuca, MZUM 104245 (4), BaUey, 1941; USNM 96263, 

 A. Lutz, Aug. 24, 1930; USNM 97417-9, A. Lutz, Cochran, and Verancio, 

 Jan. 21, 1935; MCZ 15826; MZUM 68770, A. Lutz. 



Rio de Janeiro: Barro Branco, MZUM 104246 (7), Bailej% 1941. Inde- 

 pendencia near Petr6polis, USNM 96429 (eggs), A. Lutz, Jan. 5, 1928; USNM 

 96428, A. Lutz, December 1927. Mountains near Rio de Janeiro, ZSBS 

 96376 (1), A. Lutz, 1931. Serra de Petr6poUs, USNM 96418, A. Lutz, 

 November 1928; MCZ 15827. 



Genus Eleutherodactylus Dumeril and Bibron 



1841. Eleutherodactylus Dum6ril and Bibron, p. 620. (Genotype, Hylodes 

 martinicensis Tschudi.) 



Generic diagnosis. — Pupil horizontal. Tongue subcircular or oval, 

 entire or shghtly nicked and free behind. Vomerine teeth. Tym- 

 panum generally distinct. Fingers free; toes free or slightly webbed, 

 with dilated tips. Outer metatarsals rniited. Omostemum carti- 

 laginous ; sternum a cartilaginous plate. Terminal phalanges T-shaped. 



