V 
PREFACE. 
From South Africa I am in receipt of specimens throwing 
light in some cases on British crop-attacks; also, for personal 
and collected notes and observations, to Mr. S. B. Bairstow, of 
Port Elizabeth, late President of the East Province Naturalists’ 
Society, and to Miss Glanville, lady Curator of the Albany 
Museum, Grahamstown; and am also indebted to Mr. F. von 
Schade, of Wynberg, for frequent serviceable communication. 
In South Australia I am greatly indebted, as I have been for 
3 ^ears, to the skilled co-operation and observations of Mr. Frazer 
S. Crawford, of Adelaide, Inspector under the Vine, &c.. Protection 
Act, and Government Lecturer on Economic Entomology; and 
likewise beg to acknowledge with thanks co-operation afforded by 
Mr. A. Molineux, Member of Eoyal Ag. and Hort. Soc. of South 
Australia. 
Nearer home I have to express my thanks to Senor Don K. 
Alvarez Sereix, Director of Statistics and Geography, Madrid, 
for furthering my work with great courtesy; and likewise to 
Senor Don Ignacio Bolivar, also of Madrid, for presenting me 
with copies of his valuable writings, mainly on Orthoptera ; and 
I also acknowledge with many thanks the continued communi¬ 
cations of Dr. Friedrich A, W. Thomas, of Ohrdruf, near Gotha, 
Germany, regarding species and history of Phytopti, I am 
under especial obligations to Dr. J. G. de Man, late Curator of 
the Museum, Leyden, now of Middleburg; and to Dr. J. 
Eitzema Bos, Professor of Agriculture at the Agricultural 
College, Wageningen, Netherlands, for the great assistance most 
courteously afforded me in researches on the AngidllulidcE, and 
valuable works placed in m}^ hands ; and similarly to Dr. K. 
Lindeman, Professor at the Academie Agricole, Moscow, whose 
researches on the subject of Hessian Fly are well known, my 
best thanks are offered for writings and for information. 
At home, now as ever, my thanks are due to Prof. J. 0. West- 
wood, Life-President of the Eoyal Entomological Society, for kind 
assistance, and likewise to Mr. E. H. Meade, of Manningham, near 
Bradford, especially for their timely and cordial aid on the occasion 
of the first appearance of Hessian Fly in this country; and I 
also beg to acknowdedge with thanks the assistance given me in 
comparison of specimens by Mr. Oliver E. Janson, London, and 
co-operation, in the important field of Economic Entomology, 
from Mr. S. L. Mosle}^, of Huddersfield. Amongst many to 
whom I am indebted, I do not like to omit the name of my sister 
