Al n/7.3 



SYNOPSIS 



FAMILIES AND GENERA 



NORTH AMERICAN DIPTERA, 



EXCLUSIVE OF THE GENERA OF THE NEMATOCERA 

 AND MUSCID/E, 



BIBLIOGRAPHY AND NEW SPECIES, 1878-88. 

 SAMUEL W : ' WILLI ST 



.>?C(»|A^ C'tVO> 



Professor of Anatomy, Yale University. 



NEW HAVEN: 

 J . T . Hathaway, P f h l i s h e r . 



1888. 



