PROCEEDINGS OF THE THIRD ENTOMOLOGICAL MEETING 655' 



each somite from the third to seventh abdominal somites two black 

 spots appear. When the larva has moulted twice it becomes greyer 

 but the blackish colour still remains on the dorsum especially on the 

 abdominal somites. The first thoracic somite has ten tubercles of 

 which the six at the apical margin of the dorsum bear fine white hairs, 

 projecting forwards, and the upper one on each side bears a smoky- 

 coloured very long tuft of narrow feather-hke hairs projecting obliquely 

 forwards, the lower one bearing a few white hairs. The three long 

 compact yellowish-brown dorsal tufts become conspicuous and between 

 them there are two large black spots. The fourth and fifth abdominal 

 somites have a red spot on each side near the apical margin ; the sixth 

 and seventh abdominal somites bear a somewhat large consi)icuous 

 pale yellow protuberance in the dorsal middle of each somite. On 

 the tubercles of the anal somite there are long pale smoky hairs hori- 

 zontally projecting hindwards. The three lateral remaining tubercles 

 each bears sparse but numerous long greyish-white hairs but on the 

 upper pair there are a few dark hairs intermixed, and on the eighth 

 and ninth abdominal somites long blackish brown hairs. When full- 

 fed it becomes about 14 mm. long. The caterpillar of the fourth instar 

 is C|uite similar to that of the third and becomes about 25 mm. long. 



The last instar is greyish-white, with numerous scattered very minute 

 inconspicuous darker dots on the dorsum, with the head yellowish 

 brown. The three lateral tubercles bear long whitish tufts projecting 

 shghtly forwards and below, of which the upper pair are intermixed 

 with two or three blackish-brown long bristles. The four dorsal tuber- 

 cles on the thoracic segments bear a few long pale yellowish-grey sparse 

 tufts intermixed with only one black hair and projecting slightly 

 forwards. The dorsal compact pale-yellowish-grey or pale-yellowish- 

 white tufts become four in number, of which the second one is longest 

 and the fourth is shortest. The dorsal tubercles of the remaining 

 abdominal somites bear very few short inconspicuous hairs but on 

 the eighth somite there is a very long dense yellowish brown tuft and 

 on the anal segment there are numerous long white hairs. The two 

 dorsal black spots are the same as in the previous instar. When full- 

 grown the caterpillar measures about 40 mm. long. 



The duration of the larval stage is about 50 days in the winter time, 

 but it may be less in other seasons than that. 



When full-grown the caterpillar spins a very loose whitish cocoon 

 between two leaves, in which it turns to a blackish-brown pupa. The 

 pupa is from 18 mm. (male) to 22 mm. (female) long, with rather short 

 wing-sheaths which extend down to the posterior margin of the fourth 

 abdominal segment, covered with short whitish hairs ; the hairs on the 



VOL. II E 



