CONTENTS. 



PAGE. 



Introduction 195 



Means by which insects may reach Rebecca Shoal Light-house 196 



Opportunities for breeding of mosquitoes at Rebecca Shoal 198 



Conditions at Rebecca Shoal light-station just prior to June 26 199 



Methods of obtaining insects which visited the station 200 



Insects taken at Rebecca Shoal between June 26 and July 18, 1917 201 



Migration of the house-fly 207 



Occurrence of other Diptera at Rebecca Shoal 210 



Other insects noted at Rebecca Shoal 210 



Evidence that Odonata and Lepidoptera migrate to Tortugas 210 



Do Sarcophagidse breed at Tortugas? 211 



Summary 212 



Bibliography 212 



194 



