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IKTBQDUCEIOH 
In March, 1936, the Bureau of Entomology and Plant Quarantine of the 
United States Department of Agriculture issued mimeographed publication ITo. 
E-367, entitled, "Loncho carpus species (Barbasco, Cube, Haiari, Nekoe, and 
Timbo) Used as Insecticides", in which all available information on the sub- 
ject was reviewed. The purpose of this paper is to summarize information 
on Lonchocarpus that has become available since March 1936, or that was 
overlooked in the compilation E-367. 
Lonchocarpus has become the principal source cf rotenone used in the 
United States. In 1336 this country imported 704,120 pounds crude cube, 
timbo or barbasco root, 1,124,936 pounds powdered timbo root, and 510,337 
pounds crude derris root. 
Although the literature on insecticides contains many more references 
to derris than to Lonchocarpus, the latter is receiving .an increasing share 
of attention. Insects controlled by the one are in most cases also control- 
led, by the other, and entomologists are beginning to speak of rotenone dusts 
and sprays without specifying whether made from derris or Lonchocarpus. 
The reader interested in the rotcnone-bearing plants will find addi- 
tional information on this subject in the publication E-402, "Tephrosia as 
an Insecticide — A Review of the Literature",- issued February, 1937. The in- 
formation concerning derris is now being compiled, and it is hoped that 
eventually all the information on rotenone and related insecticides, whether 
occurring in Derris, Lonchocarpus, Tephrosia, Mundulea, or other genera, will 
be assembled, in one publication. 
COMMON NAMES 
Martius (270) in 1843 recorded that in Brazil Pa ullinia pinnata L. 
was called timbo and timbo- sipe. 
The Lima Geographic Society (261) in 1894 published a paper entitled, 
"El barbasco (cubi o eumu)". This gave information on several kinds of 
barbasco which are mostly species of Tephrosia. Lonchocarpus is not men- 
tioned. 
The following common names for species of Lonchocarpus have been noted: 
Common names of Lonchocarpus species 
Species Com mo n name Where u sed Reference 
atropurpureus jebe Venezuela Pittier, 
Benth. 329,330 
blackii (F. Mucll.) bloody bark Not specified Gerth, 164 
Queensland lance-pod " " 
