A contribution to a systematic study of the South African Aphids
Thesis (MScAgric)--Stellenbosch University, 1955.
INTRODUCTION: The earliest work on African Aphids was done by Pred. V. Theobald. His first monograph appeared in 1914, and dealt with only thirty-five species of which nine where described so now to science. His later paper were published in the Bulletinof Entomological Research (1914, 1915, 1918 and 1920), and in these papers a total of fifty-five new species, were described.