CONTENTS OF PART IV. 
PAGE 
XVIII. On the Genera of the Cossonidce. By T. Vernon Wollaston, 
M.A., F.L.S 427 
ENTOMOLOGICAL SOCIETY OF LONDON, 
No. 12, BEDFORD ROW. 
»v^ \^^' COUNCIL, 1873. 
Prof. J. O. Westwood, M.A., F.L.S., President. 
H. W. Bates, Esq., F.L.S., F.Z.S. ) 
Sir Sidney Smith Saunders, C.M.G. > Vice-Presidenis. 
H. T. Stainton, Esq., F.R.S., &c. ) 
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