PSYCHE, 



A. joxjK,isr-A.ni. OF en-toi^olooy-. 



[Established in 1874.] 



Vol. 6. No. 171. 



July, 1S90. 

 CONTENTS: 



Advertisements . 366 



Descriptions of some North American Cordulina. — Hermann August 



Hagen .... - 367-373 



Descriptions of some new North American Dolichopodidae. — William 



M. Wheeler 373-379 



Entomological Notes 379-380 



Published by the 



CAMBRIDGE ENTOMOLOGICAL CLUB, 



Cambridge, Mass., U. S. A. 



YEARLY SUBSCRIPTIONS, $2. VOLUME, $5. MONTHLY NUMEROS, 20c. 



[Entered as second class mail matter.] 



