AN ADDRESS 
ENTITLED 
“WHAT IS A SPECIES?” 
READ BEFORE THE 
ENTOMOLOGICAL SOCIETY OF LONDON 
AT THE 
ANNUAL MEELING 
ON THE 
20rHh JANUARY, 1904. 
BY 
Pror. EDWARD B. POULTON, D.Se., M.A., 
Hon. LL.D. Princeron, F.R.S., 
HOPE PROFESSOR OF ZOOLOGY IN THE UNIVERSITY OF OXFORD, 
FELLOW OF JESUS COLLEGE, OXFORD, 
President of the Society. 
LONDON: 
PRINTED BY RICHARD CLAY AND SONS, LIMITED, LONDON AND BUNGAY. 
1904. 
