.1 Monograph o/ Ègyplidh Diptera. 



Introductory Note 



The foUowiiig account of the Trypaneidae forms Part II of 

 my Monograph of Egyptian Diptera, the Ist Part of which has 

 already appeared (1923). The séquence in which the families hâve 

 been dealt with is not intended to show any natural rehationship 

 but is largely a matter of eonvenience. In addition the Family 

 Trypaneidae has been chosen because of the great économie im- 

 portance of some of its members. Ceratitis capituta, which is one 

 of the most dangerous pests of the world is already, unfortunately 

 very common in this country, but D. oleae, Myiopardalis par- 

 dalina and Chaetodacus zonatus, the descriptions of which are 

 included in this Monograph, are not yet in this country, but may 

 appear at any moment in spite of the précautions which are being 

 taken to prevent their introduction. 



The number of the species of Trypaneidae recorded from 

 Egypt in 1919 was 29 but it is now increased to 38 and as this 

 increase only represents the results of three years work it is pro- 

 bable that many other species still await discovery, particularly in 

 the more remote and inaccessible parts of Egypt. It is to be regret- 

 ted that so little information is available about the biology and 

 bionomics of most of the species; as, however it is comparatively 

 easy to breed most members of this group by collecting flower- 

 heads, etc. it is hoped that the greater facility to identify spéci- 

 mens, hère provided, will encourage other workers to assist in 

 filling the gaps in our knowledge. 



My best thanks are due to Professer Dr. Bezzi of Turin, whose 

 unfailing willingness to put his great expérience, knowledge and 

 ability at my disposai has made my work much easier and has 

 helped me to settle points which otherwise would hâve remained 

 in doubt. Profe.^sor E. Hindle of the School of Medicine and 

 Mr. T. W. Kirkpatrick and Mr. C. B. Williams of the Ministry 

 of Agriculture hâve also assisted me in many ways and their help 

 is most gratefully acknowledged. My thanks are also due to 

 Dr. Enderlein of the Berlin Mu.'^eum for the loan of the type speci- 



