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set with short, sharp spines, which aid the beetle in escaping from the pupal skin 
by holding the latter firmly in the cocoon. The spiracles, which on most of the 
abdominal segments in the larva were nearly obsolete, are very prominent in the 
pupa, a pair on each of the first 6 segments and a fainter one on the seventh 
being visible. 
Up to the present it has been impossible to ascertain the length of time 
of either the larval or the pupal stage, The beetles begin their work in 
the trees at practically the same time as Oryctes and the adults are found 
together with those of the latter, so that the life periods in the larva and 
pupa of both are probably about the same, or from 18 to 24 months. 
Adult.—Rhynchophorus ferrugineus Fabr. is an extremely variable 
insect, in its markings as well as in its size. Specimens have been ob- 
tained of from 25 to 35 millimeters in length, while the color varies from 
a true ferruginous, with certain black markings more or less regularly 
placed, to almost entirely black, with only traces of ferruginous. (PI. 
WILT, fg. 1.) 
Rhynchophorus sp. 
This species is very closely related to 2. ferrugineus Fabr., if not iden- 
tical with it, merely varying in general color and in having a broad, fer- 
ruginous, longitudinal band from the front to the hinder margin of the 
thorax. (PI. VIII, fig. 2.) 
The habits and the immature stages of this insect are similar to those 
of R. ferrugineus Fabr. These beetles are found indiscriminately in 
company on the same tree, and no differences are noted until the adults 
are compared. 
Preventives and remedies.—The prevention of the first attack of the 
pest is essential. The adult male or female can not bore into the solid 
tissue as can that of the rhinoceros beetle, because the snout is small and 
the mandibles are relatively weak. For this reason the female seeks 
wounds or holes of any kind in the trunk of the tree to deposit her eggs. 
These wounds may have been caused by other insects, or they may be 
accidental. One of the chief injuries to the trunk of the tree is that 
‘aused by the gatherers of tuba, who make notches in it whereby they 
may be enabled to climb to the top. As these notches are of considerable 
size and depth, they offer excellent facilities for the beetles to enter and 
hide or lay their eggs. All such mutilation of coconut trees should 
certainly be prevented, even if it be necessary to construct bamboo ladders, 
securely fastened to the trees, as is done in some localities. There are 
frequently encountered in coconut plantations trees the bases of which 
seem to have been chopped with no apparent purpose in view. Of course, 
these offer an excellent opportunity for the beetles to begin their work. 
A good, healthy, vigorous, uninjured coconut tree is practically invulner- 
able to the attacks of the palm weevil. 
If, in spite of all precautions, the weevils gain entrance to the tree, 
the work of combating them is exceedingly difficult. Frequently, when 
