Plate 21. 



T. W. COWAN, F. G. S., F. R. .M. S. 



Editor of the ''Britlsli Due Journni: 



Author of "The Britinh Bee-Keeper's Guide Book" and of "The 



Honey-Bee. " 



This writer is mentioned pages 12, 146, 195, 239, 356, 469, 479, 4S0, 

 481, 487. 



