500 



CITRUS FRUITS AND THEIR CULTURE. 



that all stages of the insect may 

 generally be found at almost any 

 season of the year upon infested 

 trees. Generally speaking, the 

 greatest numbers of migrating 

 young may be found in one of 

 three periods, namely: in the 

 spring, usually in March and some 

 times extending into April; in 

 June or July; and in September 

 or October. During mild winters 

 a fourth brood commences in Jan- 

 uary and straggles through this 

 and the following month. 



The recorded food plants of the 

 insect are as follows: 



Banksia integrifolia, Croton 

 Eucalyptus, Murraya exotica. 



^ and Ptelea trffoliata. 



Treatment: Solutions Nos. (9). 

 (8) or (7). 



(Mytilaspis glover ii Packard). 

 The long scale is of a more linear shape than the purple 

 scale, with which it is so often associated. The outline 

 of the body is not so often curved as is that of the pur 

 pie scale. 



The female scale is brownish, about 0.11 of an inch 

 (3 mm.) in length, and less than one- fourth as wide. 

 When crowded the scales adjust themselves to their sur- 

 roundings by taking all sorts of shapes, and many will 

 be dwarfed and malformed almost beyond recognition. 

 except by microscopic examination. The young insects 

 themselves are of a translucent waxy white, with the 



Fig. 111. Purple scale 



dtricoia Packard) on 



orange. 



The Long Scale, 



