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the scattered "monte" or open woods so characteristic of many 

 parts of the provinces of Santa-Fé, Entre Rios, Córdoba and 

 Santiago del Estero. Here fires are of less practical use and 

 other methods will have to be devised for getting at them. Fre- 

 quently a sufficient quantity of locusts will gather on several 

 square leagues of country for wintering, to spread over and 

 devastate at least ten to twenty times as great an area later. 

 Last winter, for instance, all of the hibernating insects, with 

 but few exceptions, were confined to a rather limited district 

 in Santa-Fc, Córdoba and Santiago del Estero, and in Entre 

 Rios, with a, possibly, third district in Catamarca or Salta. 

 Later, these scattered out so as to cover nearly the whole of 

 the Republic and parts of Fruguay, Paraguay and Brazil, with 

 a few in Chile. 



These wintering points should be carefully watched for and 

 reported as early as possible in the season, so as to leave 

 ample time to fight them while they are condensed into as 

 small an area as possible and while they show little desire to 

 get away when approached. 



Destrnction of Saltonas. 



The young locusts or saltonas can be destroyed in many ways, 

 each of which may be more or less applicable to different 

 conditions under which they occur. Some of these methods 

 are burning, crushing, catching or bagging, trapping, posioning, 

 the use of irrigating ditches, driving etc. 



Burning.— Occasionally it may be lound practicable to destroy" 

 large numbers of the saltonas by means of fire. When found 

 among dry grasses on the open camp; in pastures by surround- 

 ing with dry straw or ha}^ and then lighting the material; by 

 the use of torches made of rags saturated with oil and passed 

 over them; by drawing pans and other devices containing fires 

 over the mangas either by hand or horses. 



Crushing. — Various means for accomplishing" this can be 

 contrived and adopted by those who wish to kill the insects. 

 Where they are on rather firm, smooth ground, heavy land- 

 rollers if passed over the insects will kill most of them. If the 

 ground should be soft and uneven this method would be of 

 little value. If the rollers could be arranged so as to go in 



