-70- 
Crocidolormia binotalls Zell., and 100 percent of Euproctis fraterna 
(Moore) and Epllachna sp. Five-percent extracts of the root bark and 
stem bark killed 100 percent of E. fraterna * A 5-percent extract of the 
leaves killed only 60 to 70 percent of Lecanium viride Green.— 
Putitarudriah and Subramaniam (312 ) • 
DIOSCOREACEAE 
(Yam Family) 
DT0SC0REA CYLINDRICA Burm. Synonymi D. hisplda Demist, Nami. 
This tuberous vine is common in the Philippine Islands, where the 
roots seem to be generally used for killing mappots infesting wounds of 
animals* A large root is peeled, slioed, and finely crushed in a mortar. 
to the consistency of a paste. In an experiment all the maggots were 
killed within 2 days.— Manresa (264 ). 
DIOSCOREA PISCATROUM Prain & Burkill. Tuba cherok. Sakut. 
A 5-peroent water extract of the roots of this Malayan fish-poison 
plant killed four-fifths of the larvae of the moth Paras a herbifera (Wlk.) 
but a 0.5-percent extract of derrii roots killed all the larvae in less 
time.— Gat er ( 153 ). 
The tuber was reported in North Borneo as a more potent fish poison 
than many species of Derris . Alcoholic and aqueous extracts of it 
showed only a slight insecticidal aotion, but the expressed sap showed 
more potency although not enough to warrant an extended investigation.— 
Tattersfield and coworkers (394 ). 
DIOSCOREA sp. 
This plant was recommended as a repellent against fleas on man.— 
Kisskalt (231). 
DIOSCOREA VILLOSA L. Wild yam. 
Extracts of the roots killed none of the mosquito larvae tested.-- 
Hartsell and Wllcoxon ( 188 ). 
TAJTIJS COMMTTNIS L. Black bryony. 
The powdered root has been recommended to destroy lice in chil- 
dren's hair.-- Greshoff (170, p. 152). 
