- 18 - 
A trace of the dry extract dissolved in water and 
diluted jifttil colorless still tastes distinctly bitter. 
If a trace of phloroglucin and about 5 cc. of fuming 
hydrochloric acid are mixed with about 5 cc. of a 
filtered, alcoholic solution of the extract (prepared from 
1 part extract to 50 parts strong spirits) a rose-red color 
develops in a short time. This reaction is based on 
Wiesner' s lignin reaction, quassiin being closely related 
to lignin. It may serve for the identification of Tinctura 
quassiae . . 
GORIAINOV, A. A. ■ '^ (53) 
THE PESTS OF AGRICUiraRAL PUI^S IN THE GOVERNMENT OF 
RIAZAK. Published by the Zemstvo of the Government of 
Riazan, 67 pp. 1914. [in Russian. Abstract in Rev. Appl. 
Ent. (A) 3:^203-206. 1S15,] 
A remedy against the nymphs of Psylla mali is spraying 
with quassia when they have not yet penetrated into the 
buds. 
(54) 
EXPERIMENTS WITH SOME VEGETABLE AMD MINERAL INSECTICIDES. 
Protect, of Plants from Pests. Friend of Nature, Sup. 
No. 1-2 (28-29); pp. 1-28. 1916. [In Russian. Abstract 
in Rev. Appl. Ent. (A)5: 24-26. 1917.] 
Decoctions of quassia ( Quassia s urinamensis ) are 
well known as contact poisons, and experiments showed 
that they are also effective as stomach poisons. Quassia 
decoction (3 pounds of quassia in 6 gallons of water boiled 
down to half the original volume, strained and mixed with 
2 pounds of soft soap and, before use, diluted in about 8 
gallons of water) produced a death rate of about 60 percent 
among the caterpillars of P. [ieris?] rapae and Barathra 
(Mfunestra) brassicae . 
GRAl^IDI, G. (55) 
DI ALCUNI AFIDI COMCTNEMENTE DANNOSI ALL' 
AGRICOLTURA. R. Scuola Super. Agr. , Portici, R. Lab. 
Ent. Agr. Cir. 3, 23 pp. 1921. [Abstract in Rev. 
Appl. Ent. (A)9: 343-344. 1921.] 
Among the sprays mentioned for combating aphids is an 
infusion of quassia (Picrasma excelsa ) which is expecially 
suited for use on peach because there is no danger of 
injuring the delicate leaves. 
