Vi PREFACE. 



For the ready courtesy with which Professor Fiirst granted me 

 permission to translate the work, I have here to express my 

 warmest thanks, and to hope that thereby he may have helped 

 on the somewhat struggling, though on that account none the 

 less certain, advance of Forestry in Great Britain towards its 

 academical recognition as a science worthy of being granted a 

 home in our Universities, where it may be taught in some 

 degree as on the Continent. 



The work was originally written by Kauschinger in 1873, 

 but was revised anonymously for its Second Edition by two 

 eminent Sylviculturists, and again, to a very great extent, 

 re-cast and re-written for the Third and Fourth Editions by 

 Dr Fiirst. The utmost care was taken to confine it within 

 narrow limits, and those desiring more detailed information on 

 any particular point are therein expressly directed to look for it 

 in the more exhaustive works of Hess (Der Forstschutz, 2 vols., 

 1887 and 1890) and Nordlinger (Lehrbuch des Forstchutzes, 

 1884). 



In the scientific nomenclature of the insects, the older generic 

 names have, for the sake of simplicity and of a clearer compre- 

 hensive view, been generally adopted in the text, as, for instance, 

 Bostrichus, Hylesimis, Ceranibyx, Bombyx, Geometra, &c., whilst 

 only the more important of the recent names awarded to the 

 same by entomologists have been added in brackets, e.g., Tomicus, 

 Hylurgus, Hammaticherus, Gastropacka and Liparis, Fidonia, &c., 

 as it is of far greater importance that the Sylviculturist should 

 at once be able to recognise an insect as belonging to a certain 

 group than to know merely its latest scientific name, perhaps 

 without due recognition of its close relationship to some other 

 injurious insect. In treating of the injurious insects, I have 

 here and there added a little to the often somewhat meagre 

 information given, and have also occasionally, in foot-notes, 

 added a few details about species of moths common in Britain, 

 but not considered worthy of special notice in the original 

 text 



