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This clear-winged hawk-moth may be seen flying 
very quickly from one coffee plant to another and, 
if the leaves on which it settles are examined, small 
greenish eggs laid singly will be found. The eggs 
are generally laid on the young leaves. 
Pests of Derris. (“Tuba”). 
Several species of Derris suffer from attacks 
of leaf-eating caterpillars such as M alias ena sp., 
(PsycMdae) , Basova alexis , F., (H esperiidae) , and 
several others. It would appear that the toxic 'sub- 
stances in the roots and stems of these plants are not 
present in the leaves and, in some species, this has 
been found to be the case. Serixia sp., ( Lamiidae ), 
has been found boring in the bark .of Barringtonia 
speciosa , which is one of the tuba plants. It is 
not yet known, however, whether this plant is of 
any use against insects. 
The plants on which pests have been found are 
in the experimental stage, and those finally selected 
for the production of insecticides may be found to 
be immune to insect attack. 
Pests of Other Crops. 
Information concerning insects attacking mango, 
pineapple, castor, pumpkins, gourds and other 
cucurbitaceous plants, brinjal, gingelly, candle-nut, 
ground-nut, patchouli, vanilla, cloves, nutmegs, 
pepper, cinnamon, ipecacuanha, cocaine, cinchona, 
sisal, Manila and Mauritius hemps, . gambier, betel- 
nut, gutta percha, tapioca and other plants has also 
been recorded. 
General Crop Pests. 
A large number of caterpillars and grasshoppers do 
not confine themselves to any one crop, but may be 
found attacking many unrelated plants. Owing to 
