456 



Transactions. 



pupa is very active if disturbed, twirling its abdomen vigorously ; two 

 distinct movements are made, a circular twirling and a side-to-side 

 movement. Movement takes place between segments 4-5, 5-6, 6-7, also 

 very slightly between 2-3, 3-4. Colour at first pure crystal-white, later 

 changing to light yellow. Just prior to emergence the wings and frontal 

 parts become speckled grey, eyes black, upper half of antennae and legs 

 speckled grey, lower half light yellow except for the tips. Headpiece 

 and abdominal segments light yellow, except dorsally, where they are darker 

 in colour. 



Chief Measurements of Pupa. 



In the South Island form the antennae are as long as the body. The 

 setal plan is identical with that of P. panacitorsens. Colour at first pearly 



Fig. 18. — Pupa of P. panacivermiforma (South Island form), ventral view. 

 Fig. 19. — Dorsal view. 



white with a faint tinge of green ; later the eyes become black, and the 

 appendages mottled grey and white." The abdominal segments 3-6 inclusive 

 become black dorsally, and this pigmentation remains in the cast skin. 



