412 



INSECTS INJURIOUS TO THE ORANGE. 



FIG. 428. 



427, is furnished with two transparent wings, which, when 

 spread, measure rather less than one-eighth of an inch across. 



Its body is olive- 

 brown; the eyes are 

 dark red. 



The four-winged 

 fly shown, much mag- 

 nified, in Fig. 428, 

 the natural size of 

 which is indicated by 

 the short lines on the 

 left of the figure, is 

 a parasite on this 

 mealy-bug, known as 

 Encyrtus inquisitor 

 Howard. Its body 



is smooth, of a shining black, and the transparent wings are 

 partly obscured by dusky markings, as shown in the figure. 



No. 264. The Mealy-bug with Long Threads. 



Dactylopius longifilis Comstock. 



In this species the adult female is nearly one-fifth of an 

 inch long, of a light dull-yellow color, its body being cov- 

 ered with a whitish powder. In Fig. 429 it is represented 

 magnified. The lateral appendages, which are seventeen in 

 number, are long, the posterior ones on each side being very 

 long, equalling, and sometimes exceeding, the entire length 

 of the body. In the larval state the male and the female 

 are very much alike, but as they approach maturity striking 

 diiferences appear. The female surrounds herself with 

 cottony material, amid which the young cluster for some 

 time after birth. The male larva forms for itself a little 

 cottony sac or cocoon, in which it changes to a pupa, from 

 which the winged insect is produced. This is shown, much 

 magnified, in Fig. 430. The wings, which are transparent, 



