THE PHILIPPINE + 
JOURNAL OF SCIENCE a 
Vou. I APRIL, 1906 No. 3 | + 
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THE PRINCIPAL INSECTS ATTACKING THE COCONUT ‘ 4 
PALM (PART Il). ~ = 
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By Cuar.es 8. Banks. ; -e 
(From the Entomological Section of the Biological Laboratory, Bureau of Science.) a : 
In Part I of this paper, insects which attack the trunk and the 4 
undeveloped leaves and flower clusters of the coconut were discussed. ° All 3 
the forms which have been described belong to the Coleoptera, but there 3 
are also certain species of Lepidoptera and Coccide which attack the 7 
coconut to a sufficient extent to warrant their being designated as ee . 
injurious. : — 
Two forms of Lepidoptera are found upon the leaves of the coconut, . 4 
one belonging to the Rhopalocera and the other to the Heterocera ; the “y - 
first is the coconut skipper, Padraona chrysozona Plotz, of the family — 
Hesperiide, and the second, Thosea cinereamarginata Banks, of the x 
Limacodide. While the nature of the damage done by the caterpillars Es 
of these two forms is very similar, the insects differ entirely from each Eg 
other both in the larval and adult stage. Neither is likely to prove a — 
very serious menace to the life of the tree. Each attacks the leaflets after “3 
they are practically full grown. A single caterpillar confines itself to a +a 
single leaflet until, with the exception of the midrib, it has entirely a 
devoured it, whereupon it proceeds to another, and so on until the cater- Ar. 
pillar has attained full growth. In the case of the coconut skipper, the * 
caterpillar not infrequently eats a space from the blade of the leaflet at - 
a point near its attachment to the main petiole, leaving the distal part a 
untouched. (See Pl. I.) “3 
*The bibliography of coconut insects, appended, includes all forms known to. i 
attack the tree, either here or in other countries, and is intended to be of further Ss 
aid to those interested in the subject from an economic standpoint. Jam 
39714 211 ; iam 
