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numerous mountain valleys of Oahu, but has not yet been found 
on the other islands. 
Euhyposmocoma trivitella Swezey. [Hyponomeutidae. ] 
The larvae of this moth are miners in the simple sterile 
fronds of Elaphoglossum reticulatum, and have been found 
only on the east side of the mountains of Kauai. 
Hyposmocoma spp. 
Several undetermined species of these tiny moths are asso- 
ciated with ferns. ‘The larvae live in cases, and several kinds 
of these cases have been found on fern fronds or in dead, 
decaying frond-stalks of tree-ferns. Possibly they are not par- 
ticularly attached to the ferns as host-plants. This remains to 
be determined. 
COLEOPTERA. 
Heteramphus filicum Perkins. [Cossonidae. ] 
This weevil is found in rotting tree-fern trunks or stumps 
on Oahu. As yet it is not known to have any other habitat, 
and is considered a fern insect. 
Heteramphus wollastoni Sharp. 
Heteramphus foveatus Sharp. 
These two closely related species are also occasionally found 
in similar situations as flicum on Oahu, but their usual food- 
plant is Astelia veratroides. 
Heteramphus swezeyi Perkins. [Cossonidae. ] 
The larvae of this species are miners in the sterile fronds 
of Elaphoglossum reticulatum, micradenium, gorgonum and 
squamosum. They pupate and develop to the adult beetle 
within the mine. The species has been observed chiefly in 
Palolo Valley, Oahu, but has been taken also at Punaluu 
towards the opposite end of the same mountain range, and 
its mines have been observed at Wahiawa about the middle of 
the range; hence, it apparently occurs throughout the range. 
It has not yet been found on the other Islands. 
Oodemas brunneum Perkins. [Cossonidae. | 
This weevil occurs in dead frond-stalks of Pteris on 
Molokai. 
Oodemas aenescens Bohman. _ [Cossonidae. ] 
This species occurs in dead frond-stalks of Czbotium spp. 
