INSECTS IXJURIOUS TO THE POTATO. 251 



Prof. R. L. Jones, of the Vermont Experiment Station. 

 Prepare the mixture in the usual manner, using six pounds 

 of copper sulfate and four pounds of freshly slaked quick- 

 lime to fifty gallons of water, to which is added four ounces 

 of Paris green, for the destruction of any other insect 

 pests. 



Spray this upon the vines so that they are well coated. 

 Where this has been carefully tested it has been reported 

 as a very successful repellant. 



A few plants may be protected from flea-beetles by 

 covering tiiem with a frame composed of two crossed 

 barrel-hoops on which is tacked some mosquito-netting or 

 other material; but this method is hardly practicable upon 

 large areas. 



Blister-beetles [Meloidce). 



Long before we had made the acquaintance of the 

 Colorado potato-bug, several species of blister-beetles fre- 

 quently brought themselves into notice by their injuries, 

 and, therefore, are now known as the *' old-fashioned 

 potato-bugs.^" 



The name of '' blister-beetles"' has been bestowed upon 

 them because of the blistering effect which they have upon 

 the skin, they being nearly related to the Spanish Fly, 

 used for that purpose, and are themselves brought to 

 manufacturing chemists. 



One of the most common of these is the Striped Blister- 

 beetle, which has three yellow strij^es upon its wing-covers, 

 while the other two common forms are of a slate-black 

 color. 



Very often when these beetles congregate in great num- 

 bers they are a great nuisance, not only in the potato- 



