?;,/■ 



SYNOPSIS 



FAMILIES AND GENERA 



NORTH AMERICAN DIPTERA, 



BIBLIOGRAPHY AND NEW SPECIES, 1878-88. 



SAMUEL W. WILL 1ST ON, 



Professor of Anatomy, Yale University. 



\i:W IIAVKN: 

 .1 1' . Hathaway, P u h l i s h e r . 



1888. 



