CONTENTS 





PAGE 



Frontispiece. Portrait of Dr. S. W. Williston. 



Preface 7 



Acknowledgements 9 



Collection and Care of Diptera 10 



Flies and Disease 12 



Flies and Crops 13 



Beneficial Flies 14 



Anent the Insect War 14 



Morphology of Diptera 15 



Classification of Diptera 16 



How to Use the Keys 20 



Table of Families 21 



Characteristics of Families and Keys to Genera 28 to 479 



Glossary of Terms Used in Dipterology 480 



Literature 494 



Index 496 



Errata 



p. 22. add the following:, line: 



Wings rounded at the ai)ex, almost always with crossveins 31. 



p. 76. Tsoecacta Garrett = AUuaudoviyia, and not Dnsyhclea. 



p. 82. third line, for Amopheles read Anopheles and for Algj/pti read 

 cegypfi. 



p. 274. for '*29" in middle of page read 24. 



pp. 286, 288, 290, 292, 294 and 295. for Trypaneida read TrupaneidsE. 



p. 405. second line, for Saerophaga read Sarcophaga. 



