INSECTS INJURIOUS TO THE ORANGE. 391 



the insect at 6, both highly magnified. It is long, narrow, 

 more or less curved and widened posteriorly, varying in 

 color from dark purple to reddish-brown, the enclosed insect 

 being yellowish white. That of the male, shown at c, also 

 magnified, resembles the female scale in form, but is nearly 

 straight, and may be at once distinguished by its smaller 

 size. In color it is much the same as the female scale, but is 

 sometimes darker, occasionally dark brown or almost black. 

 On the leaf in the figure these scales are shown of the natural 

 size. 



The eggs, which number from eighteen to twenty-five under 

 each scale, are white, and are arranged irregularly, as shown 

 at b. They hatch in Florida about the middle of March, 

 producing lice of the form shown at 6 in figure 401, but so 

 small as to be scarcely visible without a magnify ing-glass. 

 They are of a white color, yellowish at both ends, and have 

 red eyes. For a very brief period after hatching they are 

 active; then they fix themselves to one spot, where they remaia 

 stationary for the rest of their lives. Within a few days there 

 is secreted over the body of the young louse a covering of 

 fine cottony filaments, which, together with the skins she(l 

 from time to time as the insect increases in size, are eventually 

 formed^ into scales, as shown in the figure. The male develops 

 into a winged fly (see a, Fig. 401) which is red, with long, 



hairy antennae and transparent wing-s ; but 



1^1 • -.1 • .1 1 1 Fig. 401. 



the female remains witnm the scale and 



dies there. 



This scale-insect is said to have been 



imported from Bermuda on some lemons 



sent to Florida. Besides the lady-birds 



and other predaceous insects which attack 



all scale-insects, and which will be referred 



to in detail under "Eemedies,'^ this one has some special 



foes. A small mite, Tyroglyphus Gloveri Ashmead, is very 



useful in destroying it. The eggs of the mite are laid in 



December, in clusters of two or three hundred each, on the 



