A Monograph of Egyptian Diptera. 



PREFACE. 



The present volume is the first part of a Monograph of the 

 Egyptian Diptera, which it is my intention to issue in separate 

 parts, as they are completed. Each part will deal with one or more 

 families and will be complete in itself, and therefore there is no 

 necessity to adhere to any specific order of issue. The better known 

 groups are being completed first, in order to leave time to obtain 

 a fuller knowledge of the more obscure members of the Order. 



i &' 



Such a large work is perhaps rather beyond the capacity of a 

 single individual and the writer would hardly have attempted such 

 an ambitious project without the promise of help from many of the 

 leading Dipterologists such as Professor Dr. M. Bezzi, Dr. J. Ville- 

 neuve, Mr. Tonnoir, Mr. Pierre and Mr. Collin. 



I should like to express my especial indebtedness to Prof. E. 

 Hindle for much helpful advice and criticism and for many valuable 

 suggestions. I am very much indebted to Prof. Dr. Bezzi for his 

 help in the identification of the members of the family under con- 

 sideration in the present volume and also for much valuable in- 

 formation My thanks are also due to Mr. T. W. Kirkpatrick of 

 the Cotton Research Board who suggested several improvements in 

 the key to the genera and Prof. Dr. A. Mochi and Mrs. Mochi for 

 much assistance in the literature. 



H. C. E. 



