IV CONTENTS. 



PAGE 



A Further Note on Hybrid Cockatoos. By Ernest Warren, 



D.Sc.(Lond.) ...... .50.5 



Part 3, issued May, 1917. 



The Plant Ecology of the Drakensberg Range. By J. W. 

 Bews, M.A., D.Sc, Professor of Botany, Natal University 

 College. (With Plates XXXVI-XXXIX and 3 Text- 

 figures) . . . . .. . .oil 



Contributions to a Knowledge of the Terrestrial Isopoda of 

 Natal. Part I. By Walter E. Collinge, D.Sc, F.L.S., 

 etc., Research Fellow of the University of St. Andi-ews. 

 (With Plates XL-XLII) . . . . .567 



South African Bagworms. Editorial Note . . 587 



South African Bagworms ; Notes on the Psychidse and on 

 the genera Gymnelema and Trichocossus, with 

 descriptions of five new species. By A. J. T. Janse, 

 F.E.S.L. (With Plate XLIII) . " . . .589 



Descriptions of Some New South African Microlepidopterous 



Bagworms. By E. Meyrick, B.A., F.R.S. . H15 



South African Bagworms : their Transformations, Life- 

 history, and Economic Importance. Part I. By C. B. 

 Hardenberg, M.A., Grovernment Entomologist in 

 Charge of Wattle Insect Investigations. (With 

 Plates XLIV-XLVI and 6 Text-figures) . . 619 



Descriptions of New South African Arachnida. By John 

 Hewitt, Director, Albany Museum, Grahamstown. 

 (With Plate XLVII and 4 Text-figures) . . 687 



Issued April, 1919. 



Title-page of Vol. Ill . . . . i 



Contents of Vol. Ill . . . . iii 



Index of South African Mollusca .... 713 



General Index ....... 719 



