506 CITRUS FRUITS AND THEIR CULTURE. 



upon all citrus plants, olive, pear, apricot, plum, pome- 

 granate, apple, eucalyptus, rose, cape jessamine, live oak, 

 holly, oleander and some other plants. 



Treatment: Solutions Nos. (9), (7), (6) or (8). 



The Hemispherical Scale, (Lecanium hemisphcericum 

 .Targioni). This scale is of a more rounded form than 

 the other common species of Lecanium, approaching the 

 form of a hemisphere; about 0.14 of an inch (3.5 mm) 



Fig. 115. The hemispherical scale (Lecanium Jiemisphaericum Targioni) 

 on an orange twig. 



in length, 0.12 of an inch (3 mm) in width, 0.08 of an 

 inch (2 mm) in height. The color varies from a light, 

 almost reddish brown, when young, to a dark brown, 

 slightly tinged with red when old. The insects found 

 upon twigs are usually more elongate than those found 

 upon leaves. 



The egg is of an ellipsoidal shape, about 0.006 of 

 an inch (0.15 mm) in length, and of a whitish color, in- 

 clining to yellow. 



It feeds upon orange, palms, orchids, Camellia ja- 

 ponica, guavas, chrysanthemums and quite a number of 

 other plants. 



Treatment: Solutions Nos. (9), (8), (7) or (6). 



