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Santiago del Estero, northeastern Córdoba and northern Santa 

 Fé, and not the ''C/kico", as we might be led to believe from the 

 nian\^ published statements to that effect. According to the 

 reports of correspondents and personal observations there are 

 also a few other localities where the insect has been known to 

 winter in smaller numbers. These seem to be confined to the 

 provinces of Catamarca, Tucuman and Entre Rios. All of these 

 latter points, however, as well as the former lie between the 

 latitudes of 28° and 32° south, while the principal district seems 

 to be along the SO-h parallel and at a comparatively low alti- 

 tude above sea-level. As the Andes are approached and a 

 higher altitude attained an approach is made to the equator so 

 as to maintain about the same temperature and other climatic 

 conditions that appear to be more or less necessary for the 

 welfare of the hibernating insects. A locality much further 

 south Avould be too cold, while a nearer approach to the 

 equator, unless at a considerable altitude, would be too warm. 



In its wmter quarters this insect gathers in immense quanti- 

 ties. Here it crawls in among the underbrush and grasses and 

 piles up to such an extent that "heaps'" of locusts can be found 

 a foot or more high. These piles of the acridian are usually 

 formed about some bush or clump of vegetation as a nucleus. 

 Daring cold weather and at night they do not move but cling 

 closely to all kinds of vegetation and to each other as most 

 of us have seen them do in invaded districts during a pampero 

 or a very cold night. When the sun shines brightly and there 

 is little or no wind they move about to some extent and even 

 eat a little. The rule, though, during winter seems to be that 

 comparatively little food of any kind is taken by them. On 

 opening hundreds of individuals during the months of July and 

 August for the purpose of Avatching for the development of 

 eggs it was invaribly the case that they were found quite 

 empty. 



While in these Avintering places the insects are pretty weH 

 protected from many of their natural enemies. Especially is 

 this true with respect to insect-enemies, which, like themselves, 

 at this time of year are also hibernating. Birds and some of the 

 smaller and larger mammals can and do get at them and 

 destro}' comparatively large numbers. The "Gavilán" or large 

 hawk which does so much good by following the various 

 mangas over the countr}^ also accompanies them to their 

 winter-quarters. Onl}' that a large portion of these wintering 



