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LETTER OF TRANSMITTAL. 



HcjiKjhilu, T. H., April 3i-cl, lyoO. 



To the Committee on iCxperiment Station, H. S. P. A., Hono- 

 lulu, T. H. 



Ck'ntlemen : — J herewith submit for publication the Introduc- 

 tion to the lUilletin on "Leaf-Hoppers and Their Natural Ene- 

 mies," and also an index to this Bulletin. The latter has been 

 prepared by Mr. G. W. Kirkaldy. Although the material deal- 

 ing" with the stibject of Leaf-Hoppers is far from being com- 

 pletely worked out. and new material is from time to time being 

 accumulated, \'et I have thought it advisable to close lUilletin 

 1. which has now reached a length of more than 500 pages. At 

 the same time, considering the practical and scientific value of 

 such work, F ho])e tliat the suliject will be continued in another 

 JUdletin. 



y Yoivrs obedientlv, 



/ V^ R. C. L. PERKINS. 



/ - — .. 



>' •- X)iTQct?6ry^b|ision of Entomologx'. 



