300 LIEUT. -COL. J. M. FAWCETT ON THE 



early stage ; but in a very short time (perhaps half a day) it loses all its distinguishing 

 characters in that stage, and becomes uniform pale green ; a yellow lateral line above a 

 darker green line being all that remains to represent the two very distinct brown lateral 

 lines of the early stage, and the under surface, thoracic legs, claspers, and head have 

 all become pale green. The black spines on the thoracic segments, however, remain 

 the same, except that their bases become more reddish. In this stage the larva is very 

 similar to the larva of P. policenes in its green stage ; but the latter always retains its 

 brown lateral streak and its blue-grey under surface. 



Zrd (and final) stage. Like the larva of P. brasidas, this larva also becomes pale 

 yellow and almost diaphanous just before pupating. 



It feeds on Uvaria caffra (the large " Maswinda "), like the larva of P. policenes. 



Pupa. Grass-green and more rounded than in pupa of P. brasidas. Dorso-thoracic 

 prominence thicker and pointing more upward ; a pair of raised yellow lines from 

 thoracic prominence along the sides to anal extremity, also a second pair of similar 

 lines run subdorsally from base of thoracic prominence to tail, where they converge 

 and meet. 



Pupae formed on 1st February remain over the winter months in this stage. 



The imago is common in the vicinity of Durban. 



17. Papilio demodocus, Esper. (Plate XL VI. figs. 46-48, larva; figs. 49, 50, 

 pupa ; fig. 51, head of larva with tentacles.) 



Larva (early stage). Ground-colour black, with short yellow tubercles on the thoracic 

 and 10th, 11th, and 12th segments. Top of 1st segment yellow between the two 

 tubercles ; a dorsal line of diamond-shaped lozenges commences grey on the 4th 

 segment, becomes white on 6th and 7th segments, and darkens again to grey and 

 brown on the remaining segments to the tail, where it is obsolescent. On 4th, 5th, 

 and 6th segments are white lateral spots, which converge and meet the dorsal line of 

 lozenges on 5th and 6th segments; similar white lateral spots on 10th, 11th, and 

 12th segments. Tail bifid and yellow, head reddish. This larva, which apparently 

 mimics the droppings of birds, varies but little in this stage. 



Full-grown stage. The ground-colour in this stage varies according to the colour of 

 the lemon-leaves on which the larva is feeding, from pale green almost yellow to dark 

 green ; the transverse streaks on the sides also vary from light brown almost 

 ferruginous in the pale specimens to deep velvety black in the dark green examples. 



The most common form has a grass-green ground-colour, with velvety black transverse 

 streaks on the three thoracic segments, and black diagonal streaks on the 7th, 8th, 

 and 9th segments, converging till they almost meet dorsally on 8th and 9th segments. 

 Under surface and claspers greyish white, and a broad white lateral line above spiracles. 

 Head and thoracic legs reddish ; head surmounted by two reddish tubercles, between 



