32 LIST OF VOLUMES ISSUED BY THE RAY SOCIETY. 



For the Forty-ninth Year, 1892. 



A Monograph of the British Phytophagous Hymenoptera. By 

 P. Cameron. Vol. IV. Nineteen Plates. 8vo. (Com- 

 pleting the Work.) 



PRINTED BY ADLARD AND SON, 

 BABTHOBOMEW CLOSE, E.C., AND 20, HANOVER SQUARE, W. 





