Insects Injurious to the Potato d Apple. G03 



purple in color. The body is covered with a cotton like 

 material. In the adult state it has transparent wings ; the 

 body is black, and about one-tenth of an inch long. This species 

 seems to be more injurious in more Southern climates than that 

 of Vermont, but though it may not here become, as it is said 

 to be elsewhere, the worst enemy of the apple, yet it may 

 do enough damage to require attention. Dr. Harris recom- 

 mends as remedies soap suds, tobacco water, or hot water 

 alone. Of course, the roots must be uncovered to receive 

 full benefit from these substances. Allied species infest the 

 bark of the apple tree. One of these, Aspidiotus Har- 

 rissii, Walsh, is found in Illinois and adjacent States. It 

 forms scales, covering the branches. These scales are of a 

 whitish color. It has many insect enemies, and does not do 

 great damage. 



Another species, Aspidiotus conchiformis of Kiley's 

 first reports and other works, but which Riley has found to 

 be a new species and named Mytilaspis jpomicorticis, is of 

 wider distribution, and does far more damage. 



Fig. 12. 



BARK LOUISE— ASPIDIOTUS CONCHIFORMIS, Gme. 

 It extends from the Eastern border of New England West 

 of the Mississippi Hi ver. It forms long,narrow scales, which are 

 somewhat arcuate, and are much broader at one end than at 

 the other, being shaped much like the salt water mussel, 

 though popularly known as oystershell bark lice. The scales 

 are of different colors at different ages, being yellow when 



