CONTENTS 



A Revision of the North American Species of the TipuHd 

 Genus Pachyrhina Macquart, with Descriptions of New 

 Species (Diptera). By William G. Dietz . . .105 



(Issued June 10, 1918.) 



New Genera and Species of MelanopH found within the 



United States (Orthoptera; Acrididae). By Morgan 



Hebard 141 



; (Issued June 17, 1918.) 

 J 



The Evolution of the Abdominal Pattern in Tabanidae 



(Diptera). By Werner Marchand .... 171 

 (Issued June 17, 1918.) 



On Dermaptera and Orthoptera from Southeastern Brazil. 



By James A. G. Rehn 181 



(Issued June 17, 1918.) 



