358 U. S. NATIONAL MUSEUM BULLETIN 206 



Several specimens from the localities listed were compared with 

 cotypes of P. ameghini, ANS 11262-3, by Dr. E. R. Dami, who 

 informs me that they are conspecific. 



P. ameghini is extremely abundant in Minas Gerais in the short 

 grass bordering the numerous lagdas near Bello Horizonte. The 

 individuals are agile, jumping about a meter at a time, then crouching 

 among the grass blades and leaping sideways in a new direction if the 

 pursuit still continues. P. falcipes seems to take its place in the 

 south. The former has a white venter, the latter a spotted one. 



Specimens examined 

 BRAZIL: 



Bahia: Alagoinhas, Rio Catu, CM 2676-9, Haseman, Mar. 4, 1908. Boqueirao, 

 Rio Grande of the Sao Francisco basin, CM 2651-4, Haseman. 



CearX: Fortaleza, USNM 109152-4, von Ihering, 1936. 



Minas Gerais: USNM 70558-72, Metcalf, Oct. 19, 1925. Bello Horizonte, 

 USNM 97897-944, Cochran, Lisboa, and Venancio, Mar. 13-15, 1935; 

 USNM 96966-71, A. Lutz, July 6, 1933. Corrego Sao Gongalo das Tabocas 

 near Lassance, USNM 98150-2, Cochran, Dias, and Venancio, Mar. 23, 

 1935. Lag6a do Curralinho near Lassance, USNM 97016-21, A. Lutz, 

 1921-2; USNM 98153-67, Cochran, Dias, and Venancio, Mar. 21, 1935. 

 Lag6a Grande, near Morro Velho, USNM 97992-98013, Cochran, Dias, and 

 Venancio, Mar. 16, 1935. Lag6a Secca, near Bello Horizonte, USNM 97946- 

 77, Cochran and Venancio, Mar. 13-15, 1935. Ouro Prfito, USNM 98068-77, 

 Cochran, Dias, and Venancio, Mar. 19, 1935. Pirapora, USNM 98389-533, 

 Cochran, Dias, and Venancio, Mar. 22-23, 1935. Piraporinha, USNM 

 98549-67, Cochran, Dias, and Venancio, Mar. 23, 1935. Rio Pandeiro, 

 IB 496-8, 519-22. 



Sao Paulo: Rincao, USNM 96894-9, Pinto, Dec. 16, 1929. 



Genus Zachaenus Cope 



1866. Zachaenus Cope, p. 94. (Genotype, Cystignathus parvulus Girard.) 

 1905. Oocormus Boulenger, p. 181. 



Generic Diagnosis. — Pupil horizontal. Tongue round, attached to 

 a broad pedicel. Vomerine teeth in a transverse series upon palatine 

 arch. Tympanum distinct. Fingers and toes free, the tips not 

 dilated. Outer metatarsals united. Omosternum cartilaginous; ster- 

 num a cartilaginous plate. Terminal phalanges simple. 



Zachaenus parvulus (Girard) 



Plate 33, Figures a, b 



1853. Cystignathus parvulus Girard, p. 422 (type locality, Rio de Janeiro) ; 1858, 

 p. 35, pi. 3, figs. 34r-3S. 



1866. Zachaenus parvulus Cope, p. 94. — Boulenger, 1882a, p. 257. — Baumann, 

 1912, pp. 138-9, 153, 162.— Niedbn, 1923, p. 389.— Miranda-Ribeiro, 

 1926, p. 120.— Mello-LeitIo, 1937, p. 331.— B. Lutz, 1944b, pp. 1-66, 

 14 pi.; 1947, p. 247; 1949a, p. 3.— Myers, 1946, pp. 11, 29. 



