16 



statements, and I would add that were the pest allowed to mill-' 

 tiply unchecked by natural enemies, it is by nO' means necessarily 

 the plantations which hitherto have suffered most that would do 

 SO in other seasons, nor those which have escaped considerable 

 damage this year, that would be exempt another year. 



NATURAL ENEMIES OF THE LP^AF-HOPrER ALREADY PRESENT 

 IN THIS COUNTRY. 



II. During- my recent journey through Hawaii, very careful 

 examination was made as to the status of all the insects present 

 in the cane-fields in connection with the leaf-hopper attack. Some 

 of these are direct enemies of the hopper, others are attracted 

 b\- the exudations of the injured cane or the fungoid growths, 

 wliile others are parasites of some of the foregoing. 



The natural enemies that I observed to be present, and their 

 parasites, were the chief source of interest on this journey, be- 

 cause attention to the former might naturally give some infor- 

 mation as tO' what we might look to for aid in other countries, 

 while a consideration of the parasites here present would influ- 

 ence one's choice in the selection of such natural enemies as it 

 may be advisable to import. 



I will now enumerate the most important species of insects or 

 other creatures present in infected cane-fields in connection with 

 leaf-hopper attack. The habits of a few of these are, I regret to 

 say, not yet accurately determined, the time at my disposal on my 

 journey throug-h Hawaii being insufficient for examining into 

 some of the most obscure species. Those which seemed of pri- 

 mary importance were, however, for the most part fully investi- 

 gated. 



(a) The Block-Spotted Red Lady-Bird (Cocciiiella repanda.) 



One enemy of the leaf-hopper is ubiquitous or nearly so 

 throughout the cane-fields and in many parts extremely numerous. 

 This is the red, black-spotted lady-bvrd {Coccinella repanda) , long 



