APPENDIX. 



NOTES ON THE FOOD OF TROUT IN NEW ZEALAND. 



The following tables have been prepared to assist anglers 

 and others interested in the culture of trout in this 

 country to determine on the precise species of insects, 

 &c, which form the staple food-supply of these fish in 

 •our New Zealand streams and rivers. Although not by 

 any means exhaustive, the results arrived at are probably 

 of fair average value. It must, however, be remembered, 

 when consulting these tables, that the importance of the 

 caddis- worms as food is probably slightly exaggerated, 

 •owing to their easy identification when found in the 

 trout's stomach. This is chiefly due to the fact that the 

 fish always swallows the case, as well as the contained 

 larva. On the other hand, the value of May-fly nymphs 

 as trout food is probably understated, these insects having 

 no cases and being so exceedingly fragile, that they 

 soon dissolve after passing into the trout's stomach. 



Results of the examination of the contents of five 

 stomachs taken from trout captured in the South Karori 

 Stream in September, 1901. 



1. Neuroptera. 



/Larvae of ling a fereclayi 77 



,, Pycnocentria evecta or aureola 12 



■97 Caddises-; ,, Hydropsyelic colonica 6 



,, Hydrolnosis umbripennis 1 



v Pupa of ,, ,, 1 



1 " Black creeper," larva of C haul lodes dive is us 1 



Total 98 



2. Other Orders of Insects. 

 Diptera (1 larva of Stratiomid.ee, 1 LuciKa ceesar) 2 



