cane-fields. Long after the emergence of the larva ol the parasite 

 from the interior of the lady-bird and after it has completed its 

 cocoon, the mifoi"tunate beetle still shows signs of life in the 

 spasmodic twitching of its legs. 



(b) Scyiunns and Cryplolaernus. 



Tlie other lady-l)irds noticed in the cane-fields are the Platyo- 

 ?nus, fin small numbers locally), the Cryptolaemns (common lo- 

 cally) and the small Scynmus -rhndus (common locally). The 

 first named was never seen to attack leaf-hopper and was no doubt 

 attracted by Aphis, its usual food. The Crypfolaemits had been 

 evidently attracted by mealy-bug, which was common on the roots 

 and stems of a grass growing in the cane-fields. Having de- 

 molislied these the larvae of this lady-bird were starving and wan- 

 dering over the cane in search of foo'd, and in several instances 

 were seen to- kill and eat the young leaf-hoppers. The Scyiunus 

 larva w^as also seen to attack the young hoppers. Neither of 

 these species were, however, to be compared with the larva of 

 the CoccuicUa^ either in numbers or effectiveness as destroyers 

 of leaf-hoppers. 



(c) Tlic Lacc-Whiiy Fly {Chrysopa micro phya.) 



Though I have enumerated elsewhere 30 species of Hawaiian 

 knee-wings, only the one above mentioned was found in the cane- 

 fields. 



The larva of this lace-wing fly is an excellent enemy of the 

 leaf-hopper in the taller cane. In the young cane these larvae 

 are absent or scarce, because this aft'ords indifferent shelter to the 

 delicate fly. They are also very much more numerous on some 

 plantations than others, though present in all that were visited. 

 vSeveral of the flies and their larvae may in places be seen on 

 nearly every stool of cane and the eggs and puparia were every- 

 where, especially on old, unstripped leaves. The lace-wing larva 

 is not only able to destroy the young leaf-hoppers, but was also 



