PROCEEDINGS OF THE THIRD ENTOMOLOGICAL MEETING 647" 



the second form is rather darker, having two rather broad blackish 

 (not well-defined nor well-continued) subdorsal stripes, which are 

 separated into two (above and below) by a fine yellowish white stripe, 

 and a narrow pale reddish brown dorsal stripe ; in this second form 

 what one may describe as the dorsal half is blackish and has a somewhat 

 broad yellowish dorsal stripe and very narrow yellowish white subdorsal 

 stripes. In both the forms, the roundish dorsal tubercles are two on 

 each abdominal somite, and these tubercles on the first and second 

 Tire rather connected with each other ; just below the subdorsal stripe 

 there is a small round black tubercle on each abdominal somite ; the 

 first thoracic somite bears a flat and broad tubercle just below each 

 subdorsal stripe near the anterior margin ; on the rest there are two 

 small tubercles at the side of each somite, one being just below the 

 blackish brown stigma and other above the base of the leg. The dorsum 

 of the thoracic somites bears two inconspicuous tubercles on each 

 section. All these tubercles bear rather long but rather sparse whitish 

 or brownish erect hairs, but on the large dorsal ones there are short dull 

 orange-yellow scale-like hairs intermixed. The head is pale orange- 

 yellow ; h\\ the legs are rather well-developed and coloured as the body. 

 When full-grown the larva measures about 20 — 25 mm. long. 



The caterpillars live together on the underside of the leaf, and eat 

 its epidermis or chlorophyll, but the leaf is not perforated right through. 

 After the third moult the larvae become rather active and feed from 

 the margin, the entire inter-cellular tissue of the leaf being eaten away, 

 and only a skeleton remains, corresponding to the midrib and veins. 

 The young shoots and tender leaves are very often attacked. Owing to 

 this insect's very irregular occurrence throughout the whole year, the 

 tea-bush very often suffers, as the young shoots and tender leaves one 

 after another, as they come out, are usually attacked by it, and the 

 tea bush is often defoHated by such a depredation. When full-grown 

 the caterpillars almost always separate and come to a suitable shelter, 

 between the twigs or under the fallen leaves or others. Afterwards 

 they begin to spin thin pale brownish somewhat hairy cocoons in which 

 they turn to yellowish-brown or blackish pupse. The pupa is 7 — 10 

 mm. long and 2-8 — 3'2 mm. wide, and is covered with many long some- 

 what golden-yellow hairs on the dorsum especially on about the posterior 

 half of the abdomen. The wing-sheaths are large and extend to the 

 fifth abdominal segment : the anal segment is narrowly produced 

 behind and bears several slender hooks at the extremity. The dura- 

 tion of the pupal stage is from 7 to 18 days. 



The moths are greyish-brown in both sexes, but there is another 

 form of the male, which is deep smoky-brown, with the head, antennae. 



