CONTENTS 
Descriptions of New and Critical Notes upon Previously 
Known Forms of North American Oedipodinae 
(Orthoptera; Acrididae). Second Paper. By James 
A. G. Rehn 171 
(Issued December 22, 1921.) 
Mexican Records of Blattidae (Orthoptera). By Morgan 
Hebard 199 
(Issued December 27, 1921.) 
Gomphus dilatatus, vastus and a New Species, lineati- 
frons (Odonata). By Philip P. Calvert 211 
(Issued December 27, 1921.) 
A List of the Crane-flies taken in the Vicinity of Hazle- 
ton Pa. (Diptera). By W. G. Dietz 233 
(Issued December 29, 1921.) 
