PROCEEDINGS 01" THE TUIED EXTOMOLOGICAL MEETlKG 917 



Fourth stage. Length 20 mm. Tail process 8 mm., head process 

 5-5 mm. The anal process at this stage is comparatively very long, 

 deep bluish-black, and fringed with tubercles. General colour of the body 

 is light yellowish-green above and pale green at the sides and below. 

 Head-process vertical and dark brown. Along the dorsal region wedge- 

 shaped brownish marks appear along middorsal region bounded on each 

 lateral side by a long row of prominent yellowish-brown tubercles. The 

 body as a whole is fi-inged with minute white tubercles. At this stage 

 the head and tail processes look almost similar in form and colour and it 

 is often difficult to say which is head and which is the tail of the larva 

 when casually observed. 



In another six days the next moult takes place. 



Fifth stage. Length 30 mm. Tail horn 10 mm., head process 5 mm. 

 The tail horn is horizontal and the cephalic process vertical. General 

 colour pale yellowish-green with the wedge-shaped brown spots along the 

 dorsal region ; each of these gives out a short lateral streak. Spiracles 

 brown ; legs purple brown. Head and tail process bluish-black. 



The next moult takes place in another week's time. 



Sivth stage. Length 40 mm. — Tail horn 10 mm., extending 8 mm. 

 beyond the body. The head-process is short though prominent. No 

 m^ked changes in form and colour are noticed. The larva grows stouter, 

 larger and more cylindrical in shape. It also becomes voracious, feeding 

 on the foliage. Tail process bluish-black ; facial streaks, legs and spiracles 

 purple-brown. In seven or eight days more another skin is thrown off. 



Seventh stage. Length 46 mm. At this stage of the life of the larva 

 the head process is finally lost. The posterior horn is still present. It is 

 pointed and somewhat curved and extends a little beyond the anal seg- 

 ment. The whole body has a light greyish-green colour. Jliddorsal 

 region along the whole length of the bod}' is divided off from the two 

 lateral regions by a longitudinal row of prominent tubercles on each side 

 of this region. These tvro rows of tubercles begin at the prothoracic 

 region and meet at the base of the horn on the anal segment. These 

 tubercles have a pinkish colour. In this mid-dorsal region, which is 

 of a yellowish-green colour, there is an interrupted transverse band of 

 purple on each segment. There is a continuation of each of these bars 

 at the sides drawn antero-posteriorly in a tangentic mamier. The anal 

 horn is grej'ish fringed with numerous small pmk tubercles. Spiracles 

 brown. Head and piothorax greyish-green ; legs purple-bro\ui. The 

 claspers are edged with purple. 



During this last stage the larva feeds voraciously and grows in size 

 lapidly. At the same time colour changes also occur. Just before pupa- 

 tion a well-fed larva reaches 80 mm. The body becomes long, cylindrical 



