The Association of Economic Biologists 



President 



Sir DAVID PRAIN, C.M.G., CLE., LL.D., F.R.S. 



Vice-Presidents 



G. A. K. MARSHALL, C.M.G., D.Sc., F.Z.S., F.E.S. 

 A. G. L. ROGERS, Esq. 



Hon. Treasurer Hon. Sec. for Publications 



A. D. IMMS, D.Sc, E. E. GREEN, Esq., 



Rothamsted Experimental Station, Way's End, 



Harpenden Camberley 



Hon. Secretary (General and Botanical) Hon. Secretary (Zoology) 



W. B. BRIERLEY, Esq., S. A. NEAVE, D.Sc, 



Rothamsted Experimental Station 41, Queen's Gate, S.W. 7 



Council 



Prof. B. T. P. BARKER J. C. F. FRYER 



Prof. V. H. BLACKMAN, F.R.S. Prof. F. KEEBLE, F.R.S. 



Prof. A. E. BOYCOTT, F.R.S. R. T. LEIPER, D.Sc. 



S. E. CHANDLER, D.Sc. G. A. K. MARSHALL, D.Sc. 



F. J. CHITTENDEN M. C. RAYNER, D.Sc. 



A. D. COTTON A. G. L. ROGERS 



CONTENTS OF Vol. VII, Nos. 2 and 3 



PAGE 



1. . Observations on the Insect Fauna of Permanent Pasture in Cheshire. 



By Hubert M. Morris, M.Sc. (With 1 Text-figure) ... 141 



2. "Damping Off" and "Foot Rot" of Tomato Seedlings. By W. F. 



Bewley 156 



3. On the Occurrence in Britain of the Conidial Stage of Sclerotinia 



Mespili Schell. By H. Wormald. (With Plate XI and 2 Text- 

 figures .... 173 



4. Frit Fly (Oscinis frit) in Relation to Blindness in Oats. By A. 



Roebuck. (With Plate XII) 178 



5. Mycological Studies. I. On the "Spotting" of Apples in Great 



Britain. By Arthur S. Horne and Eleanor Violet Horne. 



(With 6 Text-figures) 183 



6. A Quantitative Analysis of Plant Growth. Part II. By G. E. Briggs, 



M.A. (Cantab.), Franklin KiDD, M.A. (Cantab.), D.Sc. (Lond.), and 

 Cyril West, A.R.C.Sc, D.Sc. (Lond.) (With 6 Text-figures) . 202 



7. Double Cross-Grain. By J. F. Martley. (With Plate XIII and 



11 Text-figures) 224 



8. Bionomics of Weevils of the Genus Sitones Injurious to Leguminous 



Crops in Britain. By Dorothy J. Jackson, F.E.S. (With Plates 

 XIV-XIX and 6 Text-figures.) Part I 269 



9. The Structure, Bionomics, and Economic Importance of Saperda 



carcharias Linn., " The Large Poplar Longhorn." By Walter 

 Ritchie, B.Sc, B.Sc. (Agr.), Carnegie Research Fellow, University 

 of Edinburgh. (With Plates XX-XXIII and 25 Text-figures) . 299 

 10. Review 344 



