LETTER OP SUBMITTAL. 

 Gentlemen : — 



Herewith is presented a second rei^ort on the labors of 

 the writer wdiile engaged in the study of the large Destruc- 

 tive Migratory Locust of the Argentine Republic and sur- 

 rounding regions of South America. This second report 

 was thought advisable because considerable additional data 

 has been accumulated concerning that insect since the issu- 

 ance early in 1898 of the former report. Besides, while 

 studying the Sclilstocerra paranensis, much information has 

 been gathered relative to various of the other locusts native 

 to the country. Some of these latter have also been ascer- 

 tained to likewise cause considerable damage to both wild 

 and cultivated vegetation. It is for this reason that they too 

 are treated at some length here. In fact, the greater por- 

 tion of the present report is devoted to a fairly detailed 

 synopsis of the entire locust family as represented in the 

 Republic. The most important reason for this treatment of 

 the other locusts, along with the one especially studied, is 

 that the data which makes this latter j^aper jDossible has 

 been accumulated by the Commision and should be given to 

 the public for whose benefit these studies were undertaken 

 in the first place. 



The writer wishes here to thank the Commission as a 

 whole, and the individual members separately, for the uni- 

 form courtesy with which he has been treated both while in 

 Argentina and since returning to his labors in the United 

 States. The Sub-commission also deserves special mention 

 for the faithfulness it has exhibited in gathering and for- 

 warding all of the data that has enabled the writer to make 

 the w^ork as complete as it is. 



In the preparation of this report it has been jDOssible for 

 the writer to show many of the forms treated by having so 

 good an artist as is Edna L. Hyatt at hand to make the 

 drawings from the originals. 



Lawrence Bruner. 



