80 



THE WHITE FLY (Alcyrodes citrt, Riley and Howard). 



The white fly is closely related to the scale insects, 

 although they dinner very much in appearance. The imma- 

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

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

 wings covered with white, mealy wax. 



The citrus white fly (Aleyrodes 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 flies are found on citrus in the West 



Fig 1 . 87. Citrus white fly. 



(a) winged male ; (6) end of bodg, male ; (<.) winged female ; (d, e, /, g, h, 



and t), structural detail*, (a) and (c) enlarged, others wuo. 1 i enlarged. 



(From U.S. Dept. Jgric.) 



Fig. 88. Citrus white fly. 



(a) oranye leaf show in 7 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 shall ; (j) leg of newly emerged insect not yet 

 Straightened and hardened. All figures except (a) greatly enlarged^ 

 (From U.S. Dept. Ayric,) 



