seen to obtain the eggs, its long-pointerl jaws being well adapted 

 for such work. 



(cc) HciinlcUnc Parasite of the Chrysol^a. 



The lace- wing- fly has also its parasite, in the shape of an ich- 

 neumon fly, wliich was seen laying its eggs in the pupa of this 

 useful insect. I am inclined to think that this parasite is always 

 comparatively rare and is not likely to become common enougli 

 to check the production of the lace-wings, but time alone can 

 prove this. This parasite was seen in the most diverse locali- 

 ties, but always singly. 



(d) Ncsojiiicronnis z'agiis (Hcincrobiidac) . 



This insect was fairly common in several Iccalities on the af- 

 fected cane. Its larva was not found and hence there is uncer- 

 tainty as to its food". It is possible that it was living ou the mi- 

 nute Psocidac, which browse on the black fungus which grows on 

 the excretions of the leaf-hopper, and not on the latter. As no 

 Aphis or other likely food was present it could only have been 

 l^red at the expense of one or other of these. 



(e) Rcdiiviolus blackbunii, a predatory native bug. 



This narrow pale-colored bug, A\as noticed in various localities, 

 but not very commonly. It preys on the young of the leaf-hop- 

 per and no doubt on other small insects affecting or frequenting 

 tlie cane, and it also sucks up the sweet excretion of the leaf- 

 hopper. Another species, R. lusciosits, was seen in the Olaa 

 cane-lields, but was not seen to attack the leaf-hoppers. 



(f) Natiz'c Pciitatouiid Bug (Oec/wJia grisca). 



In !arge numbers in some localities, but especially in fields in 

 the neighborhood of native forest. The young were repeatedly 

 seen sucking the juices of mature leaf-hoppers, but the fully de- 

 veloped bugs usually feed on caterpillars and larger insects. 



