The original stimulus which started KENNETH SPENCER on a study of the
Agro- myzid flies was an invitation, which he accepted, to translate
from the German the monograph on Leaf Miners by Professor E. M. HERING.
From this developed nearly 20 years of collaboration until Professor
HERING's death in 1967. Dr. SPENCER has himself described over 600 new
species in the family, many of which he collected and reared from known
host plants during his extensive travels to all the five main
continents. Largely as a result of his work, the number of species known
in Britain has increased from 90 in 1945 to 313 today. He is thus
uniquely qualified to write this book about the hundred and fifty or so
species which are regularly associated with cultivated plants. Much of
the taxonomic detail provided here will be of value primarily to
specialists; but with the help of a microscope and the botanical host
list (Chapter 2) and the numerous illustrations (mostly prepared by ANN
SPENCER) those in agri- cultural institutes and elsewhere should now be
able to identify the majority of species found attacking crops in any
part of the world.