LETTER OF TRANSMITTAL. 



To Special Committee on Experiment Station, Hawaiian Sugar 

 Planters' Association. Honolulu, T. H. 



Gentlemen: — I herewith submit for publication Part IV of 

 Bulletin I. This deals with the two-winged flies parasitic on 

 leaf-hoppers, thirty-four species of these parasites being here 

 enumerated, and thirtv-one of these described as new. 



Yours obediently. 



R. C. L. PERKINS. 



Director, Division of Entomology. 



Honolulu. T. H.. August nth, 1905. 



