CONTENTS 



No. 1 (September, 1920) 



PAGE 



1. On a New Poly embryonic Encyrtid (Chalcidoidea) Copidosoinu 



Tortricis sp. X. Bred from the Strawberry Tortrix Moth. 



By James Waterston, B.D., B.Sc. (With 5 Text-figures) J 



2. The Life History of the Strawberry Tortrix, Oxygrapha 



comariana (Zeller). Bv F. R. Petheebeidge. (With 



Plate I) 6 



3. Daily Periodicity in the Numbers of Active Soil Flagellates: 



with a brief Xote on the Relation of Trophic Amoebae and 

 Bacterial Xumbers. B3- D. Ward Cutlee and L. M. Crump. 

 (1 Map and 7 Text-figures) 11 



4. Spartina Problems. By Prof. F. W. Oliver, F.R.S. (With 



Plate II and 3 Text-figures) .... .25 



5. Investigation of the Xature and Cause of the Damage to Plant 



Tissue resulting from the Feeding of Capsid Bugs. By 

 Kenneth M. Smith, A.R.C.S., D.I.C. (With Plate III and 

 5 Text-figures) ........ 40 



6. Sphaeronema s-p. (Mouldy Rot of the Tapped Surface). By 



A. R. Sanderson. F.L.S. and H. Sutcliefe, A.R.C.S. 



(With Plates IV- VII) 56 



7. The Habits of the Glasshouse Tomato Moth, Hadena (Polia) 



oleracea, and its Control. B3* Ll. Lloyd, D.Sc (With 

 Plates VHI-X and 4 Diagrams) 66 



8. A Quantitative Analysis of Plant Growth. Part I. By G. E. 



Beiggs, M.A. (Cantab.). Franklin Kidd. M.A. (Cantab.). 

 D.Sc. (Lond.) and Cyril West. A.R.C.Sc, D.Sc. (Lond.). 

 (With 9 Text-figures) 103 



9. Xotes on Chemotropism in the House-fly. By E. R. Sfeyer 124 



Nos. 2 and 3 (December, 1920) 



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. Bv 



W. F. Bewley 156 



3. On the Occurrence in Britain of the Conidial Stage of Schrotin ia 



Mespili Schell. By H. Woemald. (With Plate XI and 



2 Text-figures) 173 



4. Frit Flv (Oscinis frit) in Relation to Blindness in Oats. Bv 



A. Roebuck. (With Plate XII) 17S 



."). Mycological Studies. I. On the "Spotting'" of Apples hi 

 Great Britain. By Arthur S. Horne and Eleanor Violet 

 Horne. (With 6 Text-figures) 1S3 





7T 



