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“SCALE-INSECTS, BARK-LICE, MEALY-BUGS. 225 
advantage of a long thread-like beak possessed by the scale-lice 
is now apparent, for with it the insect can draw its supply of 
food from the plant between the scales, and get underneath. The 
scale of the female has two small exuviz, the smallest of which 
constitutes a yellow or orange dot placed eccentrically at one 
side of the center of the scale; from this the name “The Ec- 
centric Scale” is derived. The scale of the male is smaller and 
has only one exuvia. It is often so covered with secretion as 
to be nearly invisible. 
This species seldom occurs in sufficient numbers to cause 
much damage, but in case it ‘should greatly multiply it can be 
checked with kerosene emulsion applied in the same manner as 
in the case of the others. 
Fic. 181—Aspidiotus ancylus Putn.: male and female scale, enlarged. Original. 
The specimens found in Minnesota differ from the typical 
form in lacking the spinnerets and the plate between the third 
and fourth spines, but as Prof. Comstock has described a variety 
in which the plates are lacking, it seems that it is simply a 
variety. 
Aspidiotus rapax Comst. (The Greedy Scale). 
This species, a bad pest infesting different kinds of fruit 
in California, is only found, and rarely, in our greenhouses, where 
it infests the Osmanthus fragrans. 
Aspidiotus ficus Ashm. (The Florida Red-scale). 
This, as well as some other species, occurs in Minnesota 
only in greenhouses, but there it is sometimes decidedly bad, 
and owing to the uniform and suitable temperature, it breeds 
constantly. 
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