The Association of Economic Biologists 



President 



Professor NEWSTEAD, F.R.S. 



Vice-Presidents 



Professor CARPENTER, M.R.I.A. 



Professor HICKSON, F.R.S. 



R. STEWART MacDOUGALL, D.So. 



Sir PATRICK MANSON, K.C.M.G., F.R.S. 



A. E. SHIPLEY, D.Sc, F.R.S. 



Council 

 R. S. BAGNALL Prof. P. GROOM, D.Sc. 



S. E. CHANDLER, D.Sc. A. D. IMMS, D.Sc. 



F. J. CHITTENDEN Prof. J. H. PRIESTLEY 



E. E. GREEN A. G. L. ROGERS 



Hon. Treasurer 



J. C. F. FRYER, Esq., 



Craven House, 



Northumberland Avenue 



Hon. Secretary 



Professor H. M. LEFROY, 



Imperial College of Science, 

 South Kensington 



CONTENTS OF Vol. II, Nos. 2 and 3 



PAGE 



1 . The South African Mulberry Blight Bacterium mori (Boy. and Lamb.)- 



Smith. By Ethel M. Doidge, M.A., F.L.S. (With Plates XIX 

 —XXIV.) 113 



2. " Black Neck " or Wilt Disease of Asters. By Wilfrid Robinson, M.Sc. 



(With Plates XXV, XXVI.) 125 



3. A Contribution to our Knowledge of Silver-leaf Disease. By Ph. Dr Jar. 



Smolak (Roudnici, Bohemia). (With 20 Text-figures.) . . . 138 



4. Notes on some Hymenopterous Parasites bred from the Pupae of 



Chortophila brassicae Bouche, and Acidia heraclei L. By J. T. 

 Wadsworth 158 



5. Note on American Gooseberry Mildew. By M. A. Bailey, B.A. . . 162 



6. The Effect of Various Chemicals on Blow-fly. By W. F. Cooper, B.A. 



(Cantab.), F.C.S. and W. A. B. Walling 166 



7. On Diseases of Plum Trees caused by some Species of Cytospora. By 



W. N. C. Belgrave, B.A. (With 10 Text-figures.) . . .183 



8. Studies in Enchytraeid Worms. Henlea fragilis Friend. By the 



Rev. Hilderic Friend. (With Plates XXVII— XXXII.) . . 195 



