CONTENTS 



On the Male Genitalia of the Hesperiidae of North 

 America. Paper II. By Henry Skinner and R. C. 



Williams, Jr 283 



(Issued February 12, 1923.) 



Systematic and Biological Notes on Bumblebees (Brem- 



idae; Hymenoptera) . By Theodore H. Frison . 307 

 (Issued March 2, 1923.) 



Studies in the Mantidae and Phasmidae of Panama 



(Orthoptera) . By Morgan Hebard .... 327 

 (Issued March 7, 1923.) 



