PROCEEDINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIExNCES 



Fourth Series 



Vol. IX, No. 8, pp. 257-270 August 26, 1919 



VIII 



Key to the North American Species of the 



Dipterous Genus Medeterus, with 



Descriptions of New Species 



BY 



Millard C. Van Duzee 



PRINTED FROM THE 

 JOHN W. HENDRIE PUBLICATION ENDOWMENT 



SAN FRANCISCO 



Published by the Academy 



1919 



