The Association of Economic Biologists 



President 

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



Vice-Presidents 



Prof. V. H. BLACKMAN, Sc.D., F.R.S. 

 G. A. K. MARSHALL, C.M.G., D.Sc. 



Hon. Treasurer Hon. Editors 



A. D. IMMS, D.Sc, W. B. BRIERLEY, Esq. 



Rothamsted Experimental Station, D. WARD CUTLER, M.A., 



Harpenden Rothamsted Experimental Station, 



Harpenden 



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



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



Rothamsted Experimental Station, Imperial Bureau of Entomology, 



Harpenden 41, Queen's Gate, S.W. 7 



Council 



W. LAWRENCE BALLS, ScD. A. D. COTTON, Esq. 



Prof. V. H. BLACKMAN, ScD., F.R.S. Prof. J. B. FARMER, D.Sc, F.R.S. 



F. T. BROOKS, M.A. J. C. F. FRYER, M.A. 



A. B. BRUCE, M.A. E. E. GREEN, Esq. 



E. J. BUTLER, D.Sc, CLE., M.B. G. A. K. MARSHALL, C.M.G., D.Sc 



F. J. CHITTENDEN, Esq. E. J. RUSSELL, D.Sc, F.R.S. 



CONTENTS OF Vol. VIII, No. 2 



TAOn 



1. On the supposed occurrence of Seedling Infection of Wheat by means 



of Rusted Grains. By W. L. Waterhouse, B.Sc, Agr. ... 81 



2. Some Problems of Economic Biology in East Africa (Kenya Colony). 



By W. J. DowsON. (With 1 Text-figure) 83 



3. The Experimental Production of Winged Forms in an Aphid, Myzus 



ribis, Linn. By Maud D. Haviland 101 



4. Preliminary Observations on the Habits of Oscinella fnt, Linn. By 



Norman Cunliffe, M.A. (Cantab.). (With 1 Text-figure and 



2 Charts) 105 



