^S INSECTA 



BRITANNICA. 



K 



4. p MAiiL-, 



D I P T E R A. 



VOL. I. 



FRANCIS. WALKER, F.L.S. 



lTHso,^>, 



LONDON : 



REEVE AND BENHAM, 



HENRIETTA STREET, COVENT GARDEN. 



1851. 



