CONTENTS 



No. 1 (April, 1922) 



PAGE 



1. The Control of the Greenhouse White Fly (^Astei-ochiton vaporari- 



orum) with Notes on its Biology. By Ll. Lloyd, B.8c. (Leeds). 

 (With 5 Text-figures, 2 Diagrams and Plates I and II) . 1 



2. Observations on the Ensheathed Larvae of some Parasitic Nema- 



todes. By T. GooDEY, D.Sc. (With 1 Text-figure) . . 33 



3. Leaf Character in Reverted Black Currants. By A. H. Lees, M. A. 



(With 46 Text-figures and 11 Graphs) 49 



4. Further Observations on Sitones lineatus L. By Dorothy J. 



Jackson, F.E.S. (With 2 Text-figures) .... 69 



5. Contributions to the Biology of Freshwater Fishes. I. The 



Effects of various Impurities in a Stream on the Life of Sper- 

 matozoa of Trout and Young Trout. II. Biological Problems 

 connected with a Trout Farm. By W. Rushton, A.R.C.S., 

 D.I.C., F.L.S 72 



6. Obituary Notice. Dr Caroline Burling Thompson, 1869-1921 . 81 



7. List of Members of the Association of Economic Biologists for 



1921-2 83 



8. Laws of the Association of Economic Biologists .... 90 



No. 2 (June, 1922) 



1 . Bionomics of Weevils of the Genus Sitona injurious to Leguminous 



Crops in Britain. Part II. Sitona hispidida F., S. sulci/rons 

 Thun and S. crinita Herbst. By Dorothy J. Jackson, F.E.S. 

 (With 5 Text-figures and Plate III) 93 



2. " Sleepy Disease" of the Tomato. By W. F. Bewley, D.Sc. (With 



Plates IV- VII) 116 



3. Biological Studies of Aphis rnmicis Linn. Reproduction on 



Varieties of Viciafaha. By J. Davidson, D.Sc. With a Statis- 

 tical Appendix by R. A. Fisher, M.A. (With 1 Text-figure) 



4. The Toxic Action of Traces of Coal Gas upon Plants. By J. H 



Priestley 



5. Common Scab of Potatoes. Part I. By W. A. Millard, B.Sc 



(With Plates VIII, IX) 



6. Additional Host Plants of Oscinella frit, Linn, among Grasses 



By Norman Cunliffe, M.A. (Cantab.) .... 



7. Studies in Bacteriosis. VI. Bacillus carotovorus as the cause of 



Soft-Rot in Cultivated Violets. By Margaret S. Lacey 



8. Review .......... 



9. Report of the Council ....... 



10. Obituary. A. W. Bacot 



L 



135 



146 

 156 

 165 



169 

 171 

 173 

 175 



; ^(TcH 



