20 



(g) Zcitis pcregrinus {Imported Rediiviid bug). 



In ni}' earliest reports I called attention to the efficiency of this 

 bug as a destroyer of leaf-hopper and at the same time mentioned 

 its demerits, as it is also a destroyer of highly beneficial insects. 

 This bug was first seen as a great rarity in the Government 

 Nurser}- in 1897. By 1900 it had become common and soon 

 spread generalh' over Oahu, increasing very rapidly in cane- 

 fields affected by leaf-hopper. Excepting possibly Kauai, it is now 

 found on all the islands. Both the young and mature bug feed 

 on the leaf-hoppers and they seek these when hidden at the bases 

 of the leaves as well as in the open. Not infrequently we mav see 

 this bug with its beak thrust into the body of a CoccineUa, but in 

 the canc-ficlds at the present time it is clearly feeding chiefly on 

 the leaf -hopper. 



(h) Small Bug of Fain. Anthocoridac. 



I have not been able to determine the species of this minute 

 and obscure bug. which exists in great numbers in badly affected 

 cane in some localities, and is rare or absent in others. It is of 

 nocturnal habits apparently and secretes itself during the day- 

 time m the same way and places as do young leaf-hoppers. I 

 have very little doubt that it preys on these, ior the small Antho- 

 corids are notoriously great destroyers of other small insects. Its 

 extraordinary profusion in some samples of badly affected cane 

 leads me to suspect that it will prove of great importance, and it 

 is rapidly extending its range and will soon be ubiquitous. 



(i) Hymcnoptcron.s Parasite of the Leaf-Hopper. (Ecthrodcl- 

 pliax fairchildii. 



Appended to th.is report (Note III) will be found a technical 

 description of an external hymenopterous parasite of the leaf- 

 hopper, and one which is a very efficient enemy in some localities 

 and will shortly be spread over the whole islands. 



This interesting parasite was first submitted to me by Mr. G, 



