( clxix ) 



Peter Cameron, author of the celebrated Moyiograph of the 

 British Phytophagous Hymenopteray published in four volumes 

 by the Ray Society. He was formerly a pioneer in the study 

 of British Hymenoptera, and almost the sole investigator of 

 certain obscure and difficult groups. His later writings have 

 been very copious, but consist, I believe, almost exclusively 

 in descriptions of new genera and species of Exotic Insects. 



George Masters, a well-known Anglo-Australian coleo- 

 pterist, Curator of the University Museum at Sydney. Albert 

 James Fison, an English resident in Switzerland, and collector 

 of Swiss Lejiidojitera. William Rickman Jeffrey, a veteran 

 Lepidopterist, whose name appears in the Supplement to the 

 first published List of English Entomologists (Ent. Ann. 

 1857), and who aided Buckler in his study of Lepidopterous 

 Larvae. Professor John Bernard Smith, New Brunswick, 

 U.S.A. — distinguished in Economic Entomology, and also as 

 an expert on the Noctuidae. H. E. Rudolf v. Bennigsen of 

 Berlin, Coleopterist. Professor Meinert of Copenhagen, who 

 had been in charge of the Arthropoda in the Collections of the 

 University. Professor Th. GoetsChmann of Breslau, Micro- 

 lepidopterist. Dr. Shuguroff, a young Russian Ortho- 

 pterist. Arnold Wullschlegel of Martigny, a well-known 

 Lepidopterist, 



The remainder of this Address I devote, as has been usual 

 of late years, to a " Special " subject, and entitle it — 



Secondary Sexual Characters of European and 

 Mediterranean Aculeate Hymenoptera. 



Secondary sexual characters have been defined by Darwin * 

 as those which are " attached to one sex, but not directly 

 connected with the act of reproduction." On this occasion I 



* Origin of Species (Popular Edition), p. Ill, also Descent of Man, 

 (Second Edition), p. 207. 



