ritOCEEDINGS OF THE THIRD ENTOMOLOGICAL MEETING 663 



The larva of the first instar is pale yellow, with a broad black lateral 

 stripe on each side ; on this stripe there are two paler spots, on each 

 somite, bearing a bristly hair. The head is large, dark brown, bearing 

 a few white hairs. The ventral side of the abdominal portion is greyish- 

 black : the legs are paler but with a black tinge on the outside and on 

 the claws : the prolegs are only one pair and are paler, with the end 

 yellow. It reaches about 2 mm. in length. 



The larva, after the first moult, becomes green, excepting the first 

 and twelfth segments which are somewhat yellowish. The head is 

 yellow with many brown flecks which bear pale brown hairs. The body 

 has about thirteen narrow greenish-white stripes of which the dorsal 

 middle one is rather inconspicuous. On each somite there are two 

 dorsal and a few lateral black spots each bearing a bristly hair. The 

 legs are greyish-black, and the prolegs are deep green. When full-fed 

 it measures about 6 mm. in length. 



The third instar~larva is much more greenish than in the preceding 

 instar. The head becomes pentagonal with two short triangular upper 

 processes, and it is pale yellowish-brown but all the sutures are blackish 

 brown, and it is scattered over with brown flecks. The body has about 

 eight fine deep-green dorsal stripes of which the middle two are usually 

 darker than the others ; at the side there are a few greenish-black stripes 

 which are almost always hardly connected with one another. On 

 each somite there are four dorsal and a few lateral black dots. The 

 first somite bears two somewhat brownish tubercles on the dorsmn ; 

 the anal somite is conspicuously paler ; the ventral surface of the body 

 is black, but the portion between each pair of legs or prolegs is green. 

 The legs are black, with two yellow bands : the prolegs are dark green, 

 and the anal legs are paler. It measures about 27 mm. in length. 



The fourth instar is yellowish green, and there are no conspicuous 

 stripes but numerous fine black flecks, and on each somite there are 

 two small quadrate yellow dots on the dorsum. The anal somite is 

 yellow, and is triangular when seen from above with an acute anal angle, 

 and at each side of this triangle there is a small process. The body 

 colour varies to a great extent, according to the colour of the food plant, 

 with large red spiracles. The legs are pale yellowish-green, with each 

 segmentation blackish ; the prolegs are pale reddish j'ellow, and the 

 anal legs are yellow. It is about 34 mm. long. 



The fifth instar larva is quite similar to the fourth but the colour 

 becomes deeper and the flecks are larger, the flecks varying to a great 

 extent ; in some cases they are formed of 13 rather conspicuous stripes 

 and in others they remain as irregular dots. When full-grown it reaches 



