374 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
thence down the Rio Negro to Cucuhy. From there the expedition 
retraced its steps, making few stops on the way back to Ciudad 
Bolivar. 
On this first trip relatively few birds were collected—some 288 skins 
as compared with about 3,000 on the second trip. The whole trip 
was considerably shorter and more time was spent in traveling without 
opportunity for collecting than on the second journey. The collecting 
stations and dates for the first trip, starting on the Orinoco and going 
to the Amazon, are as follows: 
November 25-27, December 8, 12, 20, 1929. Venezuela, Ciudad 
Bolivar. 
November 29-31, December 4, 7, 10, 11, 1929. Venezuela, Soledad. 
December 1, 1929. Venezuela, Isla Orocopiche, near Soledad. 
December 8, 1929. Venezuela, Laguna Icacal, near Ciudad Bolfvar. 
December 31, 1929-January 10, 1930. Venezuela, Puerto Ayacucho. 
January 10, 1930. Venezuela, near Rio Sanariapo, near Puerto Ayacucho. 
January 12, 1930. Venezuela, Rfo Orinoco, above Maipures Rapids. 
January 30, 1930—February 8, 1930. Brazil, Cucuhy, Rio Negro. 
Holt has described some aspects of this journey in an article en- 
titled ‘In Humboldt’s Wake” (Nat. Geogr. Mag., vol. 60, Nov. 1931, 
pp. 621-644). 
On the second journey the route was reversed, the party starting 
on the Amazon and proceeding up the Rio Negro, with detours to 
explore some of its tributaries such as the Rio Cauabury and the 
Rio Maturacé, thence up the Brazo Casiquiare to the upper waters 
of the Orinoco. This great river was then descended all the way 
to Ciudad Bolivar, where the collecting came to an end. Where 
the first, Orinoco-to-Amazon, journey lasted not quite 3 months, the 
second, Amazon-to-Orinoco, occupied more than three times that time. 
Furthermore, on the second journey Holt was accompanied by two 
assistant collectors, Emmet Reid Blake and Charles T. Agostini; 
and the collection of birds amassed by this industrious trio totaled 
about 3,000 specimens. 
The exact collecting itinerary, as evidenced by the dates on the labels 
of the specimens, is as follows: 
BRAZIL 
19380 
Sept. 18 Fazenda Marinha, Sao Joaquim, Rio Amazonas, Pard. 
Sept. 20 North bank of Rio Amazonas at Ceo do Arary, above 
Parintins, Amazonas. 
Sept. 26—-Oct. 2 Mandos (Flores Tramway), Amazonas. 
Oct. 4 Near Muirapinima, Rio Negro, Amazonas. 
Oct. 6 Barcellos, Rio Negro, Amazonas. 
Oct. 7 Providencia, between Sao Jofo and Florianopolis, Rio 
Negro, Amazonas. 
Oct. 9-17 Santa Isabel, Rio Negro, Amazonas. 
Oct. 21-22 Mouth of Rio Cauabury, Rio Negro, Amazonas. 
