vi PREFACE. 
Assistant Keepers of the Herbarium, the former for reading the 
proofs and the latter for working out the localities and 
geographical distribution. 
For the limits of the regions under which the localities are 
cited in which the species have been found to occur, reference 
may be made to the Preface to Volume VI. 
Besides the maps already cited in the Preface to Volumes VI. 
and VIL, the following have also been used :—Map of the 
Colony of the Cape of Good Hope and neighbouring territories. 
Compiled from the best available information. By Joun 
TEMPLER Hornek, Surveyor-General, 1895. Stanford’s map of 
the Orange Free State and the Southern parts of the South 
African Republic, etc., 1899. Carte du Théatre de la Guerre 
Sud-Africaine. Par le Comte CAMILLE Favre, 1902. 
A correct determination of the species represented by the 
names and descriptions of earlier writers is a necessary basis for 
an accurate nomenclature. With this object, in order to assist 
Dr. Bo.us and to the ultimate advantage of the Flora, the 
types of South African Orchids described by THUNBERG were 
generously entrusted to Kew in 1883 by Dr. Tu. M. Frtss, the 
Director at the time of the Botanic Garden at Upsala, and in 
the following year the same kind service was rendered for those 
of Swartz by Dr. V. B. Wirrrock, Director of the Museum of 
Natural History at Stoekholm. They were critically examined 
by Mr. N. E. Brown and compared with the specimens of LINDLEY 
preserved at Kew. Errors in the correlation of the names of the 
earlier with those of later botanists were detected by him and 
communicated to Dr. Borus as well as to Mr. Rorr. 
Further acknowledgments for the loan of types are due to :— 
Dr. J. 1. Briguet, Director of the Botanic Gardens, Geneva ; 
Geheimrath Dr. A. ENGLER, Director of the Botanic Garden, 
Dahlem ; 
Professor C. A. M. LinpMAN, Curator of the Botanical 
Department of the Museum of Natural History, Stockholm; 
and for the same service, as well as for the gift of specimens, 
Dr. RuDOLPH ScHLECHTER, Berlin. 
The general material worked out is due toa long series of 
