from the abundant material gathered from the upper Rio 
Negro drainage-area. According to Lopez, the tree is 
unusually abundant at the locality cited. 
Further collections of Cunuria crassipes have been 
made recently in the Rio Guainia area in Colombian 
territory, where the species is represented in unbelievable 
abundance in the sandy, light-forested caatingas where it 
is known by the Kuripaka Indian name d-hoon-da. 
In July 1948, Lopez and I crossed from the Rio 
Uaupés to the Rio Caqueta by way of the Tikié—Ira- 
Igarapé and the 'Taraira—Apaporis. We fully expected 
to find Cunuria crassipes in Colombian territory along 
the Taraira, but the species was not seen on the river; 
in fact, it was not seen south of the headwaters of the 
Ira-I[garapé, an affluent of the Rio Negro drainage area. 
I had never succeeded in finding Cunuria crassipes in 
the region of La Pedrera, although there are abundant 
areas there where the species might be expected to occur. 
In November 1948, I was fortunate in being able to ac- 
company General Julio Londofo, of the Colombian 
army, on a special military flight over the Amazonia of 
Colombia. In flying extremely low over the La Pedrera 
region, I saw, in a low-forested caatinga a few miles south 
of the beginning of the constriction of the Caqueta below 
the rapids at Cérdova (Cupati), what had all the appear- 
ances of numerous small trees of Cunuria crassipes. We 
cannot definitely assert that Cunuria crassipes occurs at 
this point on the Caqueté until actual collections are 
made, but we may say that it is highly probable that it 
is represented there. 
Cotomsia: Comisaria del Vaupés, Rio Papuri, vicinity of Piracuara 
Mission, alt. about 200 m. “‘Trees tall, slightly buttressed, averaging 
30 m. in height and 60 cm. in diameter. Bark thin, averaging less 
than 1 em. Latex yellowish, scant, coagulating to a non-elastic gum. 
Flowers greenish yellow. Trispermate Hevea-like capsule. Known 
locally as wah-so-né-né in Tukano.’’ August 18, 1943, Paul H. Allen 
[ 267 ] 
