ILLUSTRATIONS. 
PLATES. 
Page. 
Plate I. Fungous enemies of white flies Frontispiece. 
II. Humidity and temperature records made by combined hygrograph 
and thermograph at Orlando, Fla. 12 
III. Orange twig infested with citrus white fly, showing an effective 
infection of red fungus 20 
IV. Fungus-infected white flies: Red Aschersonia developing on Aley- 
rodes inconspicua infesting sweet-potato leaves; red Aschersonia 
infecting the cloudy-winged white fly (Aleyrodes nubifera); red 
Aschersonia pustules, showing mycelium and pycnidia 20 
V. Grapefruit leaf, showing yellow Aschersonia infecting the cloudy- 
winged white fly 28 
VI. Rank growth of Cladosporium on yellow Aschersonia 28 
VII. Leaf showing brown fungus which developed on larvae and pupae of 
the citrus white fly, film of mycelium partly torn from leaf and stem; 
Conothyrium on brown fungus 32 
VIII. Cinnamon fungus, showing pustules and the dense whitish mycelium 
forming in places a feltlike covering to underside of leaf 36 
IX. Sporotrichum fungus infecting adult white flies, causing them to 
remain attached to underside of leaf, instead of dropping as is 
usual; larvae and pupae of the citrus and cloudy-winged white flies, 
killed by fumigation and later developing the white-fringe fungus . . 36 
TEXT FIGURE. 
Fig. 1. Diagram of Gettysburg Grove; experiment in spreading red-fungus 
infection in an attempt to increase its efficacy 63 
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