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metamorphosis seem to quite unknown yet. For 
many years past, therefore, I desired to investigate 
the life history of Pterodecta felderi which is only 
species of Japanese Callidlid. 
A few years ago Mr. Mori, my assistant, reported 
to me that the moth was laying her eggs on the 
leaves. of some fern; although we could not get the 
eggs at that time, I supposed that the larva would 
be fed on the leaves of ferns. In June 1911 Mr 
Mori collected some green caterpillars at Gifu, which 
webbed up the leaves of Aspidium aculeatum and 
fed on it, unfortunately they pupated before I 
could describe and delineate them, but I supposed 
that they may be P. felderi, because there are 
very few caterpillars feeding on ferns. The pupae 
emerged on 16th and 17th of the same month and 
came to be what J had supposed. Last June Mr. 
Mori collected the caterpillars again ‘for me, and I 
could describe and delineate them. One of them 
pupated and then emerged, and also laid a few 
unfertilized eggs, so I learnt the metamorphosis Of 
ーーーーーー ズ ーーーー ハ ーーーーーーーー ハ ーー ハー へ へ ヘー ヘス ヘ ヘ ヘー ヘー スー ハハ ーー ハハ ハー ハハ ーー の ハハ ヘー ハハ ペペ ヘ ヘーーー 
the species. 
Eee.— Elliptical, very large, green, smooth, but 
under the microscope minute hair-like processes 
scattered on the surface. Size, 2x1.5x1.3 mm. 
Larva.—Head rounded, green, a few hairs, a 
black spot on both infra-!ateral sides. Body green, 
no markings, warts large, single wart has a yellow- 
ish grey hair; on segments 2 and 3 warts I and 
rr united, forming a single wart, warts 111 and Iv 
ditto; segmeuts 4 to 9 warts rrr at the upper front 
of the spiracle, wart 1v moved downwards parallel 
to v, wart v towards front; on segment II warts 
Iv and v united; spiracles pale brown; thoracic 
legs pale brown towards extreme. Length, 20 mm. 
Cocoon.— Webbed up between leaves. 
Pupa.-Spindle shape, slender, smooth, brown part- 
ly dark ; cremaster has hooked setae. Length, 17 
mm. 
Food plants.—Ferns( Aspidium aculeatum, ete. ). 
Explanation of Plate xxiv. 
Fig. 1. Female moth. 
