80 



THE white FLY (Aleyrodea citri, Riley and Howard). 



The white fly is closely related to the scale insects, 

 although they differ very much in appearance. Tin* imma- 

 ture forms of Aleyrodea are similar to the scale insects, but 

 in the adult stage both sexes arc winged, with two pairs of 

 wings covered with white, mealy wax. 



The citrus white fly {Aleyrodea citri) is a very serious 

 pest of citrus trees in Florida, but in the West Indies white 

 fly attack on citrus trees has not been very severe. (Figs. 

 87 and 88.) White ilies are found on citrus in the West 



*--jZ3cr^>3afc<i2tr; 



Fig. 87. Citrus white fly. 

 (a) vringed md'.e ; (b) end of body, male ; (<) w inged female ; (d, e, f g, h, 

 and 1), structural details, (a) and (c) enlarged, others much enlarged, 



{From U.S. Dept. Jgric.) 



Fig. 88. Citrus white fly. 

 (a) orange leaf showing infestation on under surface, natural size; [b) egg; 

 (c) same with young insect emerging; (d) larva; (e) foot of same; (/) larval 

 antenna ; (g) scale-like pupa ; (h) pupa about to disclose adult insect; (i insect 

 escaping from pupal shell ; (j) leg of newly emerged insect not get 

 straightened and hirden.d. All figures except (a) greatly enlarged. J 



(From V,S, Deft. Agric,) ' 



