-11- 
Prays cltri (Mill.) 
A spray of 120 grams of derris powder and 300 grams of soap in 
5 gallons of water gave promising results against this moth on cit- 
rus fruits in the Philippines. It killed both the egrs and pupae 
with which it came in contact.— Garcia (216 ) • 
Lasiocampidae 
Dendrolimus pini (L»), a pine moth caterpillar 
In tests against the larvae in Germany chemical proof was obtained 
that rotenone can pass through the cuticula.— Bredenkamp (86). 
Malacosoma neustria (L«), the lackey moth 
For a given insecticide there is no fixed relation between the 
quantities necessary to oontrol larvae of insects in different instars. 
Even the order of classification, according to insecticidal efficiency, 
does not remain the same for larvae of a given species during develop- 
ment, as shown in a table giving the minimum lethal doses of pyrethrins 
and rotenone per gram of body weight for larvae of M# neustria , Nygmia 
phaeorrhoea , and Porthetria dispar (q.v.) .— Fransen"* (198 ) . 
A derris dust (l percent of rotenone) killed over 80 percent of 
the larvae on elms in Amsterdam.— van Poeteren (469 , p. 51). 
Lycaenidae 
Zizera labradus Godt., the bean butterfly 
The larvae feed on the flowers and pods of bean plants in New South 
Wales, and can be controlled by dusts of derris powder (1:8), or pyre- 
thrum powder (l:3) in kaolin or talc; or by a spray of 2 ounces of derris 
powder and 2 ounces of soap in 4 gallons of water.— New South Wales De- 
partment of Agrioultuie (444 ) • 
Lymantriidae 
Lymantria monacha (L.) , the nun moth 
In tests against the larvae chemical proof was obtained that rote- 
none can pass through the cuticula.—Bredenkamp (86). 
Nygmia phaeorrhoea (Donov.), the brown-tail moth 
The most economical dust in Holland would be one containing 0.7 
peroent of rotenone used at the rate of about 3 pounds per acre, but 
