8 INTRODUCTION 



Colony; Madagascar; Northern and Southern Nigeria; St Helena; 

 Madeu-a. 



America. Distributed over North America; Brazil; Monte 

 Video (Uruguay) ; Argentine ; Valparaiso ; West Indies. 



Australia and New Zealand. 



Europe and the isles of the Mediterranean ; it is especially 

 common in Cyprus. 



Not only is the world-wide distribution of the house-fly of 

 interest but its local abundance, which will be considered in 

 a subsequent chapter (p. 65), is noteworthy. 



