208 U. S. NATIONAL MUSEUM BULLETIN 206 



Generic diagnosis. — Head large, rugose; snout rounded; a bony crest 

 between tip of snout and eye; nostrils below canthus rostralis; eyes 

 large; tongue subcircular, large, entirely attached; palatine teeth few, 

 small but strong; digits depressed, broad, with an apical disk; fingers 

 barely connected with a basal membrane; toes semipalmate ; tympanum 

 conspicuous. 



Trachycephalus nigromaculatus Tschudi 



Figure 19; Plates 19, Figuees h, i, 34, Figure b 



1838. Trachijcephalus nigromaculatus Tschudi, p. 74 (type locality, America 



meridionalis) . — Miranda-Ribeiro, 1926, p. 94; 1937a, p. 56. — Lutz and 



LuTz, 1939b, p. 251.— Carvalho, 1941, p. 101, fig. 3.— Schubart, 1939, 



p. 53. 

 1841. Trachycephalus geographicus "Dvutnih and Bibron, p. 536 (type locality, 



Brazil). — GtJNTHER, 1858, p. 118. — Cope, 1863, p. 43. — Steindachner, 



1867, p. 63. 

 1864. Trachycephalus marmoratus Steindachner, 1864a, p. 243, pi. 9, fig. 3 (type 



locality, Corcovado, Districto Federal, Brazil). 

 1867. Trachycephalus fiavolineatus Steindachner, p. 64. — Miranda-Ribeiro 



1926, p. 97. 

 1882. Hyla nigromaculata Boulenger, 1882a, p. 368. — Boettger, 1892, p. 40. — 



Baumann, 1912, p. 163.— Nieden, 1923, p. 299.— Mertens, 1926a, p. 



1; 1926c, p. 137; 1928, p. 299, fig. 3; 1950, p. 174.— A. Lutz, 1927, p. 



40.— deWitte, 1930a, p. 226.— Myers, 1946, pp. 14, 31. 

 1893. Hyla angustifrons Werner, p. 83 (type locality, Brazil); 1894a, p. 414. 

 1912. Hyla septentrionalis (not of Tschudi) Baumann, p. 163. 



Description. — Adult male, USNM 98538, Piraporinha, Minas Gerais. 

 Vomerine teeth in two well-separated, heavy, short, transverse patches 

 between the large choanae: palatine teeth present, well developed; 

 no parasphenoid teeth; tongue two-thirds the width of mouth opening, 

 rounded, with a slight notch on its partially free posterior border; top 

 of head osseous; snout relatively short and truncate when seen from 

 above, bluntly rounded in profile, with a slight indication of a bony 

 ridge extending along the upper lip and another much more prominent 

 on the canthus rostralis, the latter ending in front of the nostril; top 

 of head and area between these ridges deeply concave; upper jaw pro- 

 jecting slightly beyond lower; nostrils more lateral than superior, 

 scarcely projecting, their distance from end of snout one-half that 

 from eye, separated from each other by an interval equal to three- 

 fourths their distance from eye. Loreal region very concave and 

 sloping sharply outwards. Eye large, very prominent and bulging, 

 its diameter almost equal to its distance from end of snout; interorbi- 

 tal diameter 2/^ times that of upper eyelid, twice that between nostrils. 

 Tympanum very distinct, its greatest diameter about one-half the 

 eye diameter, separated from eye by an interval equal to one-half its 

 own diameter. Fingers webbed at the base, fourth considerably 



