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It is most prevalent in the more humid parts of the United 

 States, and also occurs to a considerable extent in the irrigat- 

 ed districts of the arid regions. 



Not unfrequently does it happen that the disease becomes so 

 prevalent towards the close of summer that two dozen or more 

 dead locusts may be found clinging to a single small plant. 

 One of these insects as it appears after death, is shown in the 

 accompanying illustration. (See Fig. 24). 



The EtnpHsa grvHi also occurs to some extent in this Repub- 

 lic where locusts killed by it have on two or three different 

 occasions been found and sent to the Commission. Other quar- 

 ters of the earth are its home also. 



The Carcaraña or Argentine Locust Fungus. 



Early in his investigations the writer discovered at Carear- 

 aña, in the province of Santa Fé, specimens of full-grown salto- 

 nas that had apparently died from one of these fungus-diseases. 

 A first glance at the specimens indicated that the fungus which 

 had caused their death was quite distinct from the Eiitpiisa 

 grylli described above. Having had some experience with 

 a fungus of similar appearance in the destruction of quite an- 

 other kind of insect in the United States, he suggested that pos- 

 sibly the find was a Sporotrichuiu. To obtain a verification of 

 this surmise, orto learn just where it belonged, specimens of 

 the fungus-killed locusts were sent to Professor Charles E. 

 Bessey of the University of Nebraska, a specialist in this 

 line. He replied that the fungus was without doubt a Sporo- 

 tricliiiDi, but as to the species he could not tell till he had grown 

 it to learn its spore-formation. He also wrote that he consi- 

 dered that a "great find" had been made, and that he hoped 

 experiments would show it to be a valuable locust-destroying 

 medium. No later information concerning the identity of this 

 fungus has been received to date. 



Locusts which have been attacked by this native fungus, 

 instead of climbing to the top of various plants so as to get as 

 much open air as possible, creep away from the light and seek 

 for dark, moist places in which to die. Consequently the}^ are 

 most often found hidden away among the roots of bunches of 

 grass, in the midst of dense, juicy foliage, etc. Here, after death. 



