638 TEOCEEDINGS OF THE THIRD ENTOMOLOGICAL MEETING 



No. 15. — Olegores citrinella, Shir. {Mikan-no-Hamaki.) 

 This Gelechiad is commonly found throughout Taiwan Island, but 

 is not very common. The larva is slender and long, pale greenish, 

 rather smooth but with a few short hairs on each somite, with the head 

 reddish brown, the chitinous plate on the first somite brown, and the 

 somites from the sixth to the end pale yellowish ; the legs are well de- 

 veloped but the prolegs are rather small. 



This caterpillar is found throughout the whole year, and it lives in 

 a shelter formed by fastening together two or more leaves of a tea-plant 

 or oranoe-tree, but sometimes in a transversely-folded leaf, feeding on 

 the top of the somewhat matured leaf. I have never seen the larva 

 feeding on the very young leaf or bud. The pupa is about 12 mm. long, 

 blackish brown, with a few pale-brown anal processes, in a cocoon of 

 transparent white silk spun in the gathered or folded leaves. The 

 moth usually emerges in March or April. 



The damage done to the tea-plant by this insect is very slight, and 

 is almost always neglected by the natives. There is only one remedy, 

 which is the hand-picking of the caterpillars in the fastened or folded 

 leaves. 



No. 16. — Acria gossypiella, Shir. (Wata-no-Hamaki.) 

 The caterpillar of this insect is usually found in May and December 

 in the district of Taihoku-Cho, living in a web spun almost always 

 rectangularly on the mid-rib of the underside of a leaf of tea, orange, 

 or camphor, but on cotton it folds a leaf at the margin and lives within. 

 The larva is very long and sub-cylindrical, pale greenish with a rather 

 broad greenish yellow dorsal stripe with the head pale yellowish green ; 

 on the anal somite there are two long hairs and a few short bristly hairs. 

 The full-grown caterpillar is about 17 mm. long. When full-grown 

 it turns to a pale brown pupa in a very thin cocoon spun in the web 

 or folded leaf. This pupa is almost always curved below at the anal 

 half, the wing-sheaths reaching to the posterior margin of the fifth 

 segment of the abdomen ; the anal apex bears a rin'g of minute spines, 

 and in the middle of the dorsal part of the ring there is a stout short 

 conical process ; on the third abdominal segn^nt from the ventral 

 anal end there is a row of minute processes on each side of the middle. 

 It is about 6 mm. long. The moth emerges somewhat abundantly 

 towards the end of June or in the middle ten days of December, but it 

 is rather a minor pest'^ the plants mentioned above. Only one 

 control measure may be recommended, viz., collecting the caterpillars by 

 hand-picking, whenever this insect appe?rs in injurious numbers. 



