HAWAII EXPERIMENT STATION. 417 



here and not attempting to i;o far beyond the pre.sent demand. The 

 idea was not to pi'esent anytliino- new, but to j^ive as much of the vast 

 amount of the available literature on this su))]'ect as would be useful. 

 The bulletin, Bulletin No. :; of this station, mentions in the introduction 

 the .seriousness of some of the insect depredations in Hawaii; empha- 

 sizes the importance of precautionary measures in cultivation; it dis- 

 tint^uishes between the two classes of insects, biting- and sucking, 

 which feed on the external parts of plants; it describes spraying 

 apparatusand explains how to spray successfully, and gives the standard 

 insecticides for both clas.ses of insects, with directions for making the 

 mixtures and applying them. That the bulletin met a popular demand 

 has been shown bv acknowledgments received from those on the reuu- 

 lar mailing list and frecjuent re((uests for additional copies. 



The entomologist has visited during the yenY the Wahiana colony, 

 island of Oahu, to investigate the so-called "melon fly" {DacKH ciicar- 

 hitse)', the Kula district, on the island of Maui, where a plant louse 

 {Ajjhis sp.) threatened the corn crop; Waimea, island of Hawaii, 

 where cutworms belonging to the famih' Noctuidie (species of the 

 genus Agrotis) had driven several holders of small places to abandon 

 their claims, and all crops, more especially garden crops, were severely 

 attacked; Makaweli, island of Kauai, to conduct spraying experiments 

 to check a scale insect {Jft/t/'/csp/'s j)/'nn;rfo/-//i/'.'<) on citrus trees; 

 Kokala, Hamakua, and Hilo districts, island of Hawaii, to investigate 

 the work of a leaf hopper {Perklnmella saechartcidd)^ a recent pest 

 causing great alarm to the sugar planters; and ]\Iakawao, island of Maui, 

 where the Japanese "rose" beetle {Adordus uiahrosis) and another 

 beetle, the' so-called " Olinda bug" {Aramig as fallerl)^ destroyed man}' 

 newly imported trees. The Japanese " rose " beetle obtained its name 

 because it has made the growing of roses practically impossible except 

 in favored localities, but it is equalh' destructive to grapes. Both 

 beetles are general feeders and many plants and shrubs sufl'er from 

 their work. 



Observations have been made and spra3nng experiments conducted 

 in and about Honolulu to check several of the scale insects seriously 

 attacking fruit trees. The report for the year contains valuable data 

 on these various pests, together with the suggestions ottered for their 

 control. Much of this information has been disseminated among the 

 people in the farmers' institute meetings and through the reports of 

 the local press. 



Other injurious insects mentioned are the peach scale {iJidftplsamyif- 

 dal})\ Aspidu4H.'< aurdiitli on citrus trees; Siplmnta ncufd^ locally 

 known as the " torpedo tty,"' on the mango; the sugar-cane boi'er; the 

 larva of a beetle {'S^j/ir/tophormobacun/.s), and a leaf hopper of the corn 

 {Dfcranotf'opis inaidin). 



S. Doc. 148, 58-2 27 



