Acknowledgements

I have pleasure in acknowledging the assistance rendered me by the secretaries of the New Zealand Acclimatization Societies and the many members of these societies who collected blood smears during the 1948 shooting season; by the New Zealand Department of Internal Affairs, and those field officers of this Department who collected material for me; by Messrs. C. A. Bradstock, P. C. Bull, J. M. Cunningham, W. H. Dawbin, C. A. Fleming, F. M. Rush-Munro, and R. J. Secker, all of whom helped in the collection of blood smears; and by the Medical Directorate of the Royal New Zealand Air Force in obtaining microfilm copies of otherwise inaccessible papers from the Library of the Surgeon-General of the United States Army.