OF THE FARM AND GARDE3S'. 147 



to counteract the injuries committed by this beetle, is to 

 prune the infested twigs, whenever found, and take great 

 care to burn them with their contents. It is in the nur- 

 sery that most damage is done by this insect, as it is sel- 

 dom numerous enough in an orchard of large trees to 

 more than cause what the philosophic orchardist ha^ 

 termed " a good summer pruning." 



BAEK-LICB. 



The Bark-lice belong to the Order Hemiptera, in 

 which they form the group or family, Coccidem, so named 

 from the genus Coccus, one species 

 of which is the remarkable Cochineal 

 Insect. Several of these insects are 

 very injurious to the Orange trees and 

 others of that Family; one infests the 

 Osage Orange, while at least two at- 

 tack our orchard trees, especially the 

 Apple, though the Pear, Quince, etc., 

 are often infested by them. 



HARRIS'S BARK-LOUSE. 

 {Aspidiotus Harrisii, Walsh.) 



This appears upon the trunks of 

 small trees, and the branches of older pjg gg'^HAEEis's 

 ones, in the form of dirty-white scales, baek-louse. 

 which are usually irregularly egg-shaped; but, however 

 variable in outline, it is always quite flat and causes the 

 infested tree to wear the appearance of figure 98; while 

 the minute eggs which are found under it in winter time 

 are invariably blood-red or lake-red. This species has 

 scarcely ever been known to increase sufficiently to do 



