EXPERIMENT STATION BULLETINS. 



257 



THE TRIANGLE FLEA-BEETLK. 



[Disonycha triangularis, Say.) 



Anotlier beetle which works something like the pallid flea-beetle is the triangle 

 flea-beetle, so named on account of three spots arranged in the form of a triangle on 

 the prothorax. This little fellow varies from three-sixteenth to one-quarter of an inch 

 in size. It is blue-black in color with an orange prothorax, on which the three dots 

 are arranged as before mentioned. Fig. 9. ^ 



Fig. 9. Triangle Flea-beetle, Disonycha triangularis. (Original.) 



The damage from this insect was comparatively slight. It occurred with the pallid 

 flea-beetle, but its numbers were far from being so great. It was quite plentiful at 

 Buchanan, and no doubt did a great deal toward bringing about the general trouble at 

 that place. 



REMEDIES. 



This insect should be treated the same as the pallid flea-beetle. 



BLISTER BEETLES. 



Throughout the region from Saginaw Bay, southwest across the State to the lower 

 end of Lake Michigan, or in other words, throughout the old Saginaw Valley, there has 

 been trouble with the blister beetles. This attack by blister-beetles, however, is to be 

 expected, being only a repetition of what has taken place in other states when the 

 raising of sugar-beets in quantity was commenced. Like several other insects the 

 blister-beetles were satisfied with the food provided by nature, until the advent of the 

 beet. True they did occasionally levy a tax on potatoes, but they dearly love the wild 



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