228 
Appearance of the Diseased Trees. 
The scale is found on the fruit, leaves, and smaller branches of the 
affected trees. In the specimens sent to England, both the oranges and 
lemons were so covered with the insect that at least half the outside of 
the fruit was concealed by their presence, and there must have been 
several thousand insects on each orange. Fig. I. attempts to represent 
the appearance of a piece of crange peel, only very slightly magnified, 
with the scales scattered over it. Ап enlarged view = several scales is 
given in Figs. III., IV., and V. 'The scale or puparium is really a dirty 
white, but the body of the insect which underlies it ro the whole a 
Eus nish-yellow or dark brown appearance, Some of these, as Fig. 
ows, are much darker than others; they very ‘often overlap one 
к, 
a lens three different stages e the insect can be detected —(i.) 
large scili Figs. IV. and V., which are the mature females after their 
second moult. The scale which covers i tici also protects the eggs when 
they are laid; (ii.) small circular scales (Fig. Ша, J which еня e fe- 
male after its first moult. g. II.) 
“after it has come to rest and cast its skin. After a second ir “these 
become the large scales, No.i.; (iii. small oval scales (Fig. IIIb.) 
У а cover the male insect. do are formed in the same way 
The Life History of the Insect. 
The various stages through which these scale insects pass, in their 
passage fou the egg to the mature form, differ somewhat in the two 
sexes, so that it will be advisable to consider them separately. 
The Female. 
We will commence жор the female. The eggs which are found 
massed together under the scale give rise to minute larve, which are all 
convenient place to fix itself. This it does by inserting its rostrum into 
the tissues of its host, and by this means it sucks up the nutritive juices 
fixed for life on the spot where it first took up its position, | 
The larval skin is not entirely thrown ой, but remains covering the 
insect, and forming the scale, shield, or puparium. In allied species 
* This figure represents the larva of an allied form, Aspidiotus ficus. It is copied 
from Comstock. i 
U 68320.  1000,—9/91. Wt. 37. A 2 
