PROCEEDINGS OF THE THIED ENTOMOLOGICAL MEETING 659 



ing laterally, conical, and bear black-tipped spines. The dorsal tuber- 

 cles on the fifth to the eighth somites are reddish brown, on the third 

 to the fourth, the ninth, and tenth somites white ; the lateral tuber- 

 cles on the fifth to the eighth, tenth, and eleventh somites are pale 

 greenish ; the remaining tubercles are black. The first somite is brown 

 and the head is blackish brown. 



The caterpillar almost always lives singly on the upperside of the 

 leaf, and eats it from the margin, the trace of the eating being nearly 

 straight. When full-gro\\Ta it begins to form a hard brown short- 

 elliptical cocoon, between the leaves or on the underside of the leaf, 

 which is usually covered with a very loose blackish brown silky thread. 



This insect probably has three generations in a year, as the moths 

 of the first brood appear in February or March, of the second in April 

 to July, and of the third from October to December ; the larval stage 

 occupies about 35 — 45 days. 



The one remedy is to collect the caterpillars and the cocoons, 

 especially the latter ; during the winter season is the most effective 

 time for this. 



No. 37. — Canea bilinea, Walk. (Futasuji-Iraga.) 

 The eggs of this species have not' yet been observed, but they are 

 probably laid upon the surface of the leaf. The caterpillar is similar 

 to that of TJiosea sinensis, but it is smaller and flatter. The dorsum 

 has a very broad white longitudinal band and on that band there is 

 a narrow pale yellowish-red dorsal stripe which becomes wide at the 

 segmentations. The duration of the larval stage is about 30 days in 

 March. The full-grown larva measures from 20 mm. to 25 mm . in 

 length. The cocoon is pale purplish-brown and is covered with a thin 

 white skin ; the length is about nine to eleven millimeters, and the 

 width is about 8 — 10 mm. It is almost always attached to the upper- 

 side of the leaf. About 21 days after the cocoon has been formed, 

 the moth emerges from the pupa. 



I first noticed this pest on orange in March of the year -1912, at 

 Taihoku-prefecture, and afterwards my assistant found it on tea bushes 

 in March of the year 1915, at Toyen-prefecture. In both cases the 

 damage done was not of a permanent nature ; but on the latter the 

 caterpillars ate out almost every vestige of green leaf and five whole 

 bushes were stripped almost bare. This shows that this Limacodid 

 is not a serious pest to orange or even to tea. 



The destruction of the cocoons is much the reliable remedy for this 

 pest. 



