2nd Ser. ZOOLOGY.] 



[VOL. IX. PART 10. 



THE 



TRANSACTIONS 



OF 



THE LINNEAN SOCIETY OE LONDON 



THE GENITALIA OF BOTH THE SEXES IN DIPTERA, AND THEIR 

 RELATION TO THE ARJIATIJRE OF THE MOUTH. 



BY 



AVALTER WESCIIE, F.R.M.S. 



{CommHiitciited hij John IIopkinson, F.L.S.) 



LONDON: 



PRINTED FOK THE LINNEAN SOCIETY 



nV TAYI.OK AND KllANCIS, KKI> I.ION COIIKT, FI.KET STREET. 



SOLD AT THE SOCIETY'S APARTMENTS, BURLINGTON-HOUSE, PICCADILLY, AV., 

 AND BY LONGMANS, GREEN, AND CO., PATERNOSTKR-UOW. 



JullJ 1906. 



