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CYMBOPOGON NARDUS (L.) Rendle. Citronella grass. 
^or b long time oil of citronella has been used as a repellent and 
nttractant. The following abstracts are only a few of those in the 
literature. 
Oil of citronella is the most effective repellent for mosquitoes 
and has been used since 18S7 on all the author's insect-collecting 
trips. — Smith ( 369 , p. 542). 
The following formula is the most effective mosquito repellent 
tried: Oil of citronella 1 ounce, spirits of camphor 1 ounce, and oil 
of cedar 0.5 ounce. This mixture is effective against all mosquitoes 
tested except the yellowfever mosquito. The following formula is used 
against mosquitoes and black flies: Mutton tallow 2.5 pounds, black 
Canadian tar 0.5 pound, oil of citronella 3 ounces, and oil of penny- 
royal 1.5 ounces.— Howard ( 203 , p. 13). 
In India fly papers treated with oil of citronella were exposed in 
an orchard from March to June. The number of Dacus fruit flies caught 
was about 18,000.— Howl ett (205 , p. 413). 
Several oils were tested in pans as traps to capture the adult Medi- 
terranean fruitfly. Of the vegetable oils tried, oil of citronella cap- 
tured the most fruitflies, but of the oils used kerosene caught the most.- 
Sever in ( 362 ) . 
Oil of citronella (Ceylon) smeared over fresh beef liver in a pint 
Mason ,jsr wps a good repellent to the screwworm. There was no emergence 
of flies from meet treated with it. — Parman rjid coworkers (302). 
The follo^.ving formulas are used as mosquito-repellent salves: 
Bamber oil, used in the Orient, consists of oil of citronella 1.5 parts, 
kerosene 1 part, coconut oil 2 parts, and carbolic acid 1 percent. 
More lasting and more effective is Sierra oil, which consists of oil 
of citronella 3 ounces, spirits of camphor 1 ounce, oil of tar 1 ounce, 
oil of pennyroyal 0.25 ounce, and castor oil 4 ounces.— Freeborn ( 145 ) . 
Oil of citronella was always repellent to the oriental cockroach. ~ 
Cole (101). 
Oil of citronella mixed in equal parts with spirits of camphor or 
oil of lavender gives good protection against mosquitoes for limited 
periods. The time of effectiveness can be extended by adding an equal 
quantity of castor oil.— Twinn ( 404 ) . 
CYNODON DACTYLON (L.) Pers. Synonym: Capriola dactylon Kuntze. 
Bermuda grass. 
In India the fresh juice was applied for scabies. — Watt ( 422 , v. 2, 
p. 680;. 
