CONTENTS. 



The Larger Boreal American Hesperidae, including Euda- 

 mus, Erycides, Pyrrhopyge and Megathymus. By 

 Henry Skinner, M.D., Sc.D 169 



(Extras issued to the author August 18, 1911.) 



The Boreal American Species of Chlorippe (Doxocopa, 

 Apatura) Lepidoptera. By Henry Skinner, M.D., 

 Sc.D 211 



(Extras issued to the author August 18, 1911.) 



New and Little Known Bees. By T. D. A. Cockerel] . 217 



(Extras issued to the author August 24, 1911). 



The Gerrids of the Atlantic States (Subfamily Gerrinse), 



By J. R. de la Torre Bueno ..... 243 



(Extras issued to the author August 24, 1911.) 



Descriptions of North American Mymaridse with Synony- 

 mic and Other Notes on Described Genera and Spe- 

 cies. By A. A. Girault 253 



(Extras issued to the author October 18, 1911.) 



