HOMOPTERA 



45^ 



Glover's scale, Lepidosaphes gloverii. — This is the second of the 

 two most common species of scale-insects found on citrus trees in 

 Florida. In this species the scale of the female is much narrower than 

 that of the preceding species. This species is widely distributed over 

 the warmer parts of the world. 



The oyster-shell scale, Lepidosaphes ulmi. — This is a northern rep- 

 resentative of the genus to which the two preceding species belong. 

 It is closely allied to the purple scale; in fact Figure 536 would serve 

 to illustrate this species except that it does not occur on orange and 

 that it is found chiefly on the trunk of its host. The two species differ 

 in the characters presented by the pygidium. The oyster-shell scale is 



Fig. 536. — Lepidosaphes pinnceformis : i, scales on orange, natural size; la, 

 scale of female, dorsal view, enlarged ; ib, scale of female with ventral scale and 

 eggs, enlarged; ic, scale of male, enlarged. 



a cosmopolitan insect, and it infests very many species of shrubs and 

 trees. In the North it is the commonest and best-known scale-insect 

 infesting fruit-trees and various ornamental shrubs. It is discussed 

 in all of our manuals of fruit-insects; in some of them it is described 

 under the name Mytilaspis pomorum. 



The scurfy scale, Chiondspis furfura. — This, like the preceding 

 species, is a very common pest of the apple and various other trees 

 and shrubs; but usually it is not very destructive. In this species 

 the scale of the female is widened posteriorly, and bears the exuviee 

 at the anterior end (Fig. 512, ic). The scale of the male is very small, 

 being only .75 mm. in length, narrow, and tricarinated (Fig. 512, la). 



