MacKenzie. — On New Zealand Whitebait. 



309 



EXPLANATION OP PLATES XXXIII. AND XXXIV. 



Trioza alexi?ia, sp. nov. 



Plate XXXIII. 



Fig. 1. Fore wing of adult insect — 

 AB. Primary stalk. 

 BF. Stalk of subcosta. 

 FH. Kadius. 



BC. Main upper stalk of cu- 

 bitus. 

 BN. Main lower stalk of cu- 

 bitus. 

 CD, CE. Secondary branches of 



BC. 

 NK, NL. Secondary branches of 

 BN. 

 HM. Clavus. 

 Fig. 2. Hind wing of adult insect. 

 Fig. 3. Head of adult insect — 

 O. Ocelli. 



A. Anterior projections. 

 Fig. 4. Ocellus of adult insect — 



A. Lens. 



B. Pigment. 



Fig. 5. Hind leg of adult insect — 



A. Conical projection. 



B. Hooks and sucker. 

 Fig. 6. Abdomen of female-- 



A. Upper genital plate. 



D. Lower genital plate. 

 C. Egg-sheath. 



B. " Main rod." 



E. Anus. 



Fig. 7. Abdomen of male insect — 



A. Upper genital plate. 



B. Lower genital plate. 



C. Claspers of B. 

 E. Penis. 



D. Hinge of penis. 



K. Duct running through penis. 



H. Anus on upper genital plate. 



G. Spur. 

 Fig. 8. Antenna of adult insect. 

 Fig. 9. Rostrum of adult male. 



Fig. 1. Pupa— 



A. Fringe. 



B. Wing-covers. 



C. Budimentary wings. 



D. Pseudovitellus glands. 

 O. Ocelli. 



Plate XXXIV 

 Fig. 2 



Fringe (much enlarged) — 

 A. Cups. 

 Fig. 3. Leg of pupa. 

 Fig. 4. Anal ring of pupa. 

 Fig. 5. Rostrum of pupa, showing 

 one of the many arrange- 

 ments of the setae. 



All drawings greatly enlarged. 



Art. XXXV. — Notes on the Whitebait of Nexv Zealand. 



By A. J. MacKenzie, Curator, Kanieri Lake Fish-hatchery, 



Westland. 



[Read before 



Cornniunicated 

 the Wellington 



by Sir J. 



Hector. 

 Society, 18th 



November, 



Philosophical 

 1902.1 



I have seen a notice in the Otago Witness of a paper read at 

 a meeting in Wellington about New Zealand whitebait, the 

 writer contending that whitebait were the young (or fry) of 

 Galaxias attenuatns . This is a question I have been taking a 

 considerable interest in for some time, and as I have been 

 experimenting with whitebait at the hatchery the following 

 may prove of interest , and assist to solve the question of what 



