368 U. S. NATIONAL MUSEUM BULLETIN 206 



Dimensions. — Head and body 62 mm.; head length 13 mm., width 

 17.5 mm.; femur 21 mm.; tibia 18.5 mm.; foot 21.5 mm.; hand 15.5 

 mm. 



Mathematical analysis (in percentage of the total length): 



Color in alcohol. — Dorsum chestnut brown; venter pale yellow, with 

 a coarse, dark brown reticulation completely covering all surfaces of 

 the body, this dark pattern thinning anteriorly to narrow disconnected 

 blotches on head and shoulders, thickening to a large irregular black 

 longitudinal spot on either side of sacrum and on upper part ot femur; 

 lower femur, anal region, and venter with round yellowish spots of 

 fairly uniform size encircled by the brown network; palms and soles 

 dull brown, the tubercles much lighter; throat black. 



Color in life. — A rich olive green above, with yellow spots on sides 

 and belly in a black ground. Throat nearly solid black. 



Remarks. — The described specimen was collected in a dip net while 

 catching minnows in a small duckweed-covered stream. A native 

 fisherman who was passing by said that this species is used to bait 

 fishhooks. 



Specimens examined 



BRAZIL: BM 1932.10.2.1, Steindachner. 

 Amazonas: Rio Livramento, AMNH 44787, Krukoff, February 1935. USNM 



28928, Steere. 

 MiNAS Gerais: Janudria, IB 418. Bello Horizonte, on road from Lagda Santa, 



USNM 97990, Cochran, Lisboa, and Venancio, Mar. 14, 1935. 

 Sao Paulo: Francisco Maximiano, IB 567. Luzitania, IB, 108. OrlSndia, 



IB 255-6. 

 PARAGUAY: MHNP 90-141. Asunci6n, BM 1930.11.27.272-5, Schoute; 

 ZSBS 119/29 (2), Second Chaco Expedition, December 1926. Nord- 

 Chaco, ZSBS 134/32 (2), Third Chaco Expedition, July 5, 1931. TacaagU, 

 ZSBS 120/29, Second Chaco Expedition, November 1925. Tumana, Chiquitos, 

 ZSBS 118/29, Second Chaco Expedition, Oct. 23, 1926. 



Genus Microhyla Tschudi 



1838. Microhyla Tschudi, pp. 28, 71. (Genotype, Hylaplesia achatina Boie 

 (nomen nudum) = Microhyla achatina Tschudi.) 



Generic diagnosis. — Prevomer divided, the postchoanal portion lost; 

 palatine present or absent. No clavicles, precoracoids or omoster- 

 num; sternum cartilaginous. Vertebral column diplasiocoelous. Ter- 



