32 THE ORTHOPTERA OF MINNESOTA. 



they are in the former case only a makeshift to be employed 

 when better remedies can no longer be used. In places 

 where the\' can not be employed other machines may be 

 used, which capture the locusts in bags, or in which they 

 are crushed by rollers, etc. 



To repeat again, the true remedy consists in plowing, 

 and wherever locusts are numerous this method has to be 

 employed. Plow the soil containing the eggs during the 

 autumn, if possible, as by doing so the surface of the plowed 

 ground becomes thoroughly compact by wind, rain and 

 snow. Plowing in spring, if well done, and as early as pos- 

 sible, will also be successful, though in some cases, and 

 especially in a dry season, a few locusts may succeed in 

 reaching the surface. 



REMEDIES AGAINST COCKROACHES AND OTHER 

 ORTHOPTEROUS INSECTS. 



Remedies, or supposed remedies, against the former are 

 verv numerous, and many patented and unpatented nos- 

 trums are in the markets to help the irate housekeeper to 

 destroy the enemy. As a general rule, however, these nos- 

 trums are onlv good for the dealer who sells them and the 

 buvers. Vigilance and cleanliness are necessar\^ to prevent 

 the cockroaches becoming the nuisance they are now in 

 many homes. A large number of our dwelling places are, it 

 almost seems, built to assist the increase of this pest, by 

 giving them lots of snug quarters in which the}' are saie 

 and out of reach. Besides, these intruders, like the English 

 Sparrow, have imported themselves to remain, and as both 

 seem to possess great intelligence the^^ are perlectly able to 

 take care of themselves and to keep out of the wa\' of ser- 

 vants and food doctored with poison for their benefit. Mr. 

 F. H. Chittenden, in one of the excellent publications of the 

 Division of Entomology, Department of Agriculture, under 

 its efficient chief Dr. L. 0. Howard, gives the following 

 remedies: 



