HEM/P TER A . 
Ib3 
be dissolved and washed down by the rains. This will serve 
to destroy certain other pests, as well as the woolly aphis. 
In case it is desired to rid an infested tree of this pest, the 
trunk form should be washed off with a strong solution of 
soap applied with a sponge, taking care to destroy all eggs; 
and the ground should be treated with carbon bisulphide, as 
for the Grape Phylloxera. 
Family ALEYRODIDiE (Al-eu-rod'i-dae). 
The A/eyrodes (Al-eu-ro'des). 
The insects of the genus Aleyrodes were for a long time 
classed with the Coccidae. In their immature state they are 
scale-like in form (Fig. 200), and often somewhat resemble 
certain species of Lecanium. But the 
mature insects differ so much from the 
Coccids that the genus has been sepa¬ 
rated as a distinct family. They are very 
small insects; the species with which I 
am acquainted have an expanse of 
wings of about one eighth of an inch. 
Both sexes are winged; and, as with 
other Hemiptera except the Coccids, 
there are two pairs of wings. In the adult state, all the 
species are nearly of the same color; the wings are white, 
sometimes spotted ; the body is usually yellowish, sometimes 
pinkish, and more or less spotted with black. The most 
striking character presented by the adults, in addition to the 
fact that both sexes are winged and each has two pairs of 
wings, is the presence of a whitish powder with which the 
wings and body are covered. It is this character that 
suggests the name of the genus, which is from the Greek 
aleurodes , like flour. 
Fig. 200.— Aleyrodet. 
