244 
Transactions of the Boyal Society of South Africa. 
SUMMAEY. 
Brief notes are given on the South African representatives of the- 
Order Erysiphaceae. These cause a number of widely distributed and 
more or less destructive diseases of plants in this country, but they are 
not easily identified owing to the almost invariable absence of perithecia. 
The species occurring in South Africa are enumerated, and a list 
given of the specimens contained in the Union Mycological Herbarium,, 
Pretoria. 
Two new species of the genus Uncinula are described. 
The Botanical Laboratories op the 
Union op South Aprica, 
Pretoria. 
