FROGS OF SOUTHEASTERN BRAZIL — COCHRAN 161 



6. albomarginata — group 



The frogs of the alboma7'ginata group, albofrenata, albomarginata, 

 albosignata, musica, and prasina, are predominantly green in color. 

 There are other green frogs, notably those of the aiirantiaca group, 

 but they are obviously of another stock. 



The absence of an outer metatarsal tubercle characterizes this 

 group, and its member species are all moderately large in size, from 44 

 through 59 mm. in the adult. A rudiment of a pollex in most of the 

 species relates the group somewhat to the frogs of Group 3. A heel 

 appendage is present in three species; the others have distinct glandular 

 lines along the outer limb borders. The leg is not excessively long 

 in any, as the heel does not extend beyond the nostril. The tibia is 

 strong, but not so wide in proportion to its length as in the frogs of 

 the rubra group. 



For a statistical analysis of members of the albomarginata group here 

 discussed, see pages 373 and 379. 



Key to the frogs of Group 6 from southeastern Brazil 



a'. Glandular dorsolateral folds present. 



¥. No dermal heel appendage; heel reaching to between ej'e and nostril. 



prasina (p. 171) 

 6'. A dermal heel appendage; heel reaching to end of snout. 



albomarginata t,p. 164) 

 a^. No dorsolateral folds present. 



b^. A dermal appendage on heel, or at least a conical tubercle. 



c^ Toes three-fourths webbed; disk of fourth toe covering one-third tym- 

 panum; heel reaching to center of eye; no rudiment of a pollex. 



albofrenata (p. 161) 



c^ Toes one-half webbed; disk of fourth toe covering one-half tympanum; 



heel reaching beyond anterior border of eye; an enlarged tubercle at 



base of first finger albosignata (p. 168) 



6^. No dermal appendage on heel musica (p. 170) 



Hyla albolineata Lutz and Lutz (1939a, pp. 69, 84, pi. 1, fig. 2; type 

 locality, Teres6polis, Kio de Janeiro) is said by its authors to be 

 related to H. prasina. It should therefore fall in Group 6, but as no 

 examples of it have been available to me, I can make no comments 

 upon it. 



Hyla albofrenata A. Lutz 



Plate 15, Figures a-c 



1924. Hyla albofrenata A. Lutz, 1924a, p. 241 (type locality, environs of Eio de 

 Janeiro); 1926a, pp. 7, 14.— Myers, 1946, pp. 12, 30.— B. Lutz, 

 1949b, p. 559, fig. 1. 



Description. — Adult female, USNM 96340 (cotype), Paineiras, city 

 of Rio de Janeiro. Vomerine teeth in two short, heavy, well separated, 

 transverse series between and behind the posterior level of the choanae; 



262006—55 12 



