-180- 
Plpjits dipped in 300 cc. of water containing 0,3 gm. of caffeine 
were fed to caterpillars, 70 percent of which were killed after a long 
period. — Maxwell-Lefroy and Finlow ( 272 , pp. 277, 313). 
Caffeine (2 and 5 percent) in sugar solution was ineffeotive against 
housef lies .—Jackson and Lefroy ( 217 ) . 
Caffeine (10 percent in flour) had no effect on the caterpillars 
of Prodenia litura (F.) . — DeBussy ( 76) • 
Spray solutions of oaffeine were tested against the bean aphid. 
The minimum concentration required to kill about 95 percent of the aphide 
was greater than 0.5 gm. to 100 oo. of liquid, while that of nicotine 
sulfate was 0.009 gm.— Richardson and Smith. ( 522 ). 
Caffeine solutions mixed with equal parts of honey were fed to 
honeybees. A 1:100 dilution killed all the bees tested within 24 hours, 
a 1:200 dilution within 48 hours, and a li400 dilution 34 percent with- 
in 48 hours. Arsenious oxide (dilution 1:10,000) killed all the bees 
within 5 hours .--Ginsburg ( 160 ) . 
Caffeine had some mothproofing value but insufficient for practical 
use. Goods treated with a combination of caffeine with oleic acid were 
quickly damaged by clothes moth larvae.— Minaeff and Wright ( 281, p. 
1190) . 
In laboratory tests caffeine used as a dust killed only 15.5 per- 
cent of the codling moth larvae tested.— McAlister and Van Leeuwen ( 249 ) , 
When alkaloids and their salts were fed to silkworms, the* mortali- 
ties in 3 days were as follows: Caffeine benzoate 0, caffeine citrate 
20, caffeine hydroxide 15, oaffeine salicylate 30, and caffeine tannate 
40 percent. There was much feeding in each case.—Ginsburg and Granett 
(161), 
Comments by reviewe r.— These abstracts show that oaffeine has no 
practical value as an insecticide or as a mothproofing agent. 
GALIUM APARINE L. Bedstraw. 
GALIUM TRIFLORUM Michx. Fragrant beastraw. 
Extracts from these plants were not repellent to the Japanese 
beetle.— Metzger and Grant (277). 
GARDENIA CAMPANULATA Roxb. Bihmona. 
This fish-poison plant grows profusely in Assam. The juice was 
evidently an efficient larvicide in dilution up to 1 in 80. The larvi- 
cidal action was due to a saponin.— Mans on ( 266 ) . 
