CONTENTS. 



Page 



Introduction 7 



Biological importance of the Southeastern United States 8 



Localities at which collecting was done, with dates of visit 9 



Field work 10 



Climatal conditions affecting results 11 



Life zones of region visited 11 



Number of broods of Acridiidae 12 



Life histories with reference to season 12 



Zonal distribution of genera of Acridiidae of eastern North America... 12 



Locust societies and habitats 14 



Comparison of campestral and sylvan locusts 19 



Macropterous and brachypterous locusts 20 



Brachypterism in other Orthoptera 21 



" Burning-over " as a factor in distribution 22 



Hybrids, varieties, and other topics 22 



Species of economic importance 23 



List of species and localities from which collected 24-55 



3 



