-90- 
extraotives oontent 9*4 percent. The natives use the roots as a fish 
poison more- extensively than those of the white haiari (L. martynii ) , 
as the plant is more common. The plant is not yet used Tor commercial 
purposes, although it is under experimental cultivation in British 
Guiana and the Federated Malay States.— Krukoff and Smith ( 235 ) • 
Alcoholic extracts were tested against the bean aphid,— Tatter sfi eld 
and coworkers (393) • 
LONCHOCARFUS LATIFOLIUS (mild.) H. B. K. Acurutu. 
Extracts of this species from Trinidad were slightly toxic to the 
bean aphid.— Tattersfield and Gimingham (591 ). 
LONCHOCARPTTS MARTYNII A. C. Smith. Tfhite haiari. 
This speoies appears to be found throughout British Guiana. The 
rot en one content of the roots averaged only 2*5 percent, and the ex- 
tractives content 10.1 percent. The plant is not used for oommeroial 
purposes, although it is under experimental cultivation in British 
Guiana and the Federated Malay States. — Krukoff and Smith (235 ). 
Alcoholio extraots were tested against 'the bean aphid.— Tatters- 
field and coworkers (393 ). 
LONCHOCARFUS RARIFLORUS Mart. 
This speoies has a wide range, being found throughout Amazonian 
Brazil and in British Guiana. The roots are not collected commercially, 
as they contain only traces of rot en one and an average of 7 peroent 
of extractives. An extract of the roots is often used by the natives 
for exterminating "sauba* ants.— Krukoff and Smith (235 ) . 
LONCHOCARPUS URUCU Killip and Smith. Timbo vermelho (Amaxonian Brazil). 
Timbo uruou (Para). 
This species is widely distributed throughout Brazil and it wns found 
often in large clumps several acres in extent. The roots often are 3.5 
lnohes in diameter and extend from 65 to 82 feet in length, resembling 
garden hose, and confined to the upper 12 inches of the soil. The 
rotenone content averaged 4.4 percent, and the extractives content 17 
percent. The bulk of roots and powder now exported from Para and Manaos 
is from this speoies.— Krukoff and Smith (235 ). 
During the past decade this speoies has strongly competed with the 
L» utills as an insecticide, but L. utills was tested as an insecticide 
Tong before timbo was known to have inseotioidal properties. Both 
species have reoently been given new botanical names. 
