77 

 BOARD OF AGRICULTURE AND FORESTRY. 



Division of Entomology. 



PRINCIPAL CITRUS INSECTS IN HAWAII. 

 By Jacob Kotinsky. 



(Continued from last "Forester.") 



TABLE FOR IDENTIFICATION OF COMMON CITRUS INSECTS IN 



HAWAII. 



This table was drawn up to aid the grower of citrus trees in 

 identifying the insects upon them that are of economic import- 

 ance. It is especially hoped that school teahers will make liberal 

 use of it in determining citrus insects that may come their way. 

 The table does not include all the insects that may be on citrus 

 plants. Even as it is, some of the insects, like the snow and acu- 

 minate scales and the white-fly are, so far as known, only of local 

 occurrence and would not have been included but for their eco- 

 nomic importance elsewhere and the possibility of their assuming 

 similar importance here in course of time. More detail instruc- 

 tions for the use of the table will follow it. It is not intended 

 that the table should answer the purpose of absolute, unquestioned 

 identity of the insects enumerated therein, and the student is re- 

 ferred to subsequent pages in the text for more detail descriptions. 

 Name preceded by asterisk ('•-) is of a beneficial insect 

 Name preceded by ?* is of an insect of questionable use in orchards. 



I. ox VERY YOUNG, SOFT GROWTH. 



Dark, small, soft, smooth-bodied, winged and wingless, usually 



in large numbers Aphis or Plant-lice 



Among the aphis usually. 



Stationary, minute, pearly white '^Egg of Hover-Fly 



Green maggot, pointed at mouth end, where it often holds 



an aphis *'Larz'a of Hover-Fly 



Miniature alligator-like insect, dark body with whitish 



markings ^Larva of 8-spotfed Ladybird 



Brown, spiny grub, over twice as long as broad 



'^Larva of YeUozv-Shouldcred Ladybird 



2. ANYWHERE ON THE TREE, LEAVES, OR FRUIT. 



With legs and wings freely used. 

 Wings four. 



Wing covers horny, shell-like insect shaped more or 



less like the half of a sphere, flat side down "^Ladybird 



Steel-blue in color "^Steel-blue Ladybird 



Uniformly-orange Wrange Ladybird 



Red or orange, spotted with black y-spotted Ladybird 



Orange, with round dark spots in lighter circles. . 



*io-spotted Ladybird 



