The Association of Economic Biologists 



President 



Professor NEWSTEAD, F.KS. 



Vice- Presidents 



Professor CARPENTER, M.R.I.A. 

 Professor HICKSON, RR.S. 

 R. STEWART MacDOUGALL, D.Sc. 

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



Council 



Prof. B. T. R BARKER A. D. IMMS, D.Sc. 



S. E. CHANDLER, D.Sc. Prof. J. H. PRIESTLEY 



F. J. CHITTENDEN A. G. L. ROGERS 



E. E. GREEN E. S. SALMON 



Prof. R GROOM, D.Sc. 



Hon. Treasurer 

 J. C. F. FRYER, Esq., 



Craven House, 



Northumberland Avenue 



Hon. Secretary 



Professor PERCY GROOM, 



Imperial College of Science and Technology, 

 South Kensington 



CONTENTS OF Vol. Ill, Nos. 2 and 3 



PAGE 



1. A Bacterial Spot of Citrus. By Ethel M. Doidge, D.Sc, F.L.S. 



(With Plates III— XIII.) 53 



2. Report on a Trial of Tarred Felt "Discs" for protecting Cabbages and 



Cauliflowers from attacks of the Cabbage-root Fly. By J. T. 

 Wadsworth. (With Plate XIV.) 82 



3. On the Resistance to Fungicides shown by the Hop-mildew {Sphaerotheca 



humuli (D.C.) Burr.) in different stages of Development. By E. S. 

 Salmon. (With Plate XV.) \ . 93 



4. Observations on the Larval and Pupal Stages of Agriotes ohscurusy 



Linnaeus. By George H. Ford, M.Sc. (Vict.). (With Plates 



XVI and XVII and 1 Text-figure.) 97 



5. On the Biology and Economic significance of Tipula paludosa. By 



John Rennie, D.Sc, F.R.S.E. Part 11. Hatching, Growth and 

 Habits of the Larva. (With Plates XVIII— XX and 3 Text- 

 figures.) 116 



6. Note on Attacks of Phyllotreta vittula on Spring Corn . . .138 



