PLATE I. 
ie: 
Te 
VI. 
VII. 
VT: 
IETGes ele 
CoO ~I o> Ot WH DD 
. Fig. 1.—Tender shoot swarming with adult citrus white flies. Fig. 
PE EUSTRAELONS: 
PLATES. 
Page. 
Fig. 1—Orange covered with sooty mold. Fig. 2.—Leaf of orange 
Coatedewilh, COOlY MOld ee 2-s2s. tak hee tae Serertala eee oe Frontispiece. 
Fig. 1.—Aleyrodes mori on mulberry. Fig. 2.—Woolly white fly 
(Aleyrodes howardi) on orange. Fig. 3.—Paraleyrodes persex on 
orange. Fig. 4.—Woolly white fly (Aleyrodes howardi) showing 
eggs in circles, and adults. Hig. 5.—Aleyrodes sp. on sea grape. . - 10 
Fig. 1—Sooty mold on orange following white-fly attack; broken and 
falling from leaf. Fig. 2—Sooty mold on cinnamon tree following 
atacksiby- cinnamon Seales 22.2 05.5 S225. seus wwe nse 2 een 2 Soin 18 
. Fig. 1.—China tree defoliated during winter. Fig. 2.—Same tree in 
Hilmeoliaee dm sUMNIMer- 2-H e eas oe Sai. see creda saterace wae cle he 34 
. Fig. 1.—Leaflet of umbrella China tree showing infestation by 4. 
citri. Fig. 2—Umbrella China tree infested by A. citri, showing 
Granger trees WM, NeaOl MOUSE tis. =f sre ele oss, ato -latas erm do nee mio 34 
Fig. 1—Nursery citrus trees infested with white flies, aE out in an 
isolated noninfested grove without having leaves removed. Fig. 
2.—Buggy in an orange grove; buggy-top full of adult white flies 
ready to be carried to other groves. Fig. 3.—Train at station; adult 
citrus white flies swarming from near-by umbrella China tree into 
coaches ready to be carried for miles down the Florida east coast. - 48 
Fig. 1.—Rearing cages in position on orange trees. Fig. 2.—En- 
Pah e Osta Ie CROC tee ee seiste ce iafel 275 cesar tere G ciard Satetapes sine os 52 
Fig. 1.—Leaf showing pupa cases of A. citri; also pup and eggs. 
Fig. 2.—Leaf showing heavy infestation by A. citri. Fig. 3.— 
MealgsnOwANe OU Par CARES Ol AWM Ifen ds esse ec a2 2 oe cen = = 62 
Pe NN CamO SAMO cemMlarere dis se es fe revs a) yeh shoes ie) 4 heteveates oustersle acre aeci3ie 66 
. Fig. 1.—Adults of A. nubifera, the cloudy-winged white fly, and 
many eggs scattered over leaf. Fig. 2.—Larvee and pupe of both 
the citrus white fly and cloudy-winged white fly killed by fumi- 
gation, and eggs of the citrus white fly along midrib...........-.- 98 
TEXT FIGURES. 
Map showing distribution of the citrus white fly (Aleyrodes citri) in 
Lo alG Bie coeSot ae oo emo COD ORO ee Ee oe Oe Nas ace HeEacen ere 26 
. Diagram of laboratory grounds at Orlando, Fla..............-----.-- 37 
ReerctUEUS! WHILG Wliyy OF Cements cree eam os A Sanie scone cae Fe 53 
. The citrus white fly: Larva, first instar, dorsal view...........------ 59 
. The citrus white fly: Larva, first instar, ventral view...-....-----.-- 59 
. The citrus white fly: Antenna and left hind leg; first instar larva... - 59 
. The citrus white fly: Larva, second instar, ventral view.......-.----- 60 
. The citrus white fly: Larva, third instar, ventral view....--- pessoas 60 
