DETERMINING THE FLIGHT OF MOSQUITOS. 



By James Zetek, Entomologist. 

 Isthmian Canal Commission, Ancon, Canal Zone. 



Introduction. 

 Description. 



A. General Considerations. 



1. Physical Factors. 



2. Biotic Factors. 



3. Historic Factors. 



B. Detailed Description. 



1. Collection and Care of Larvae and Pupae. 



A. Collection. 



B. Transportation. 



C. The field laboratory. 



D. Breeding-out methods. 



2. Care of Adults. 



A. At the laboratory. 



B. Transporting adults. 



3. Coloring of Adults. 



A. Anilin dyes used. 



B. Staining the adults. 



4. Liberating Colored Adults. 



5. Collection and Examination of Adults found in buildings. 



A. Collection by hand. 



B. Collection by traps. 



C. Collection by tents. 



D. Collection by sweeping nets. 



E. Examination of adults for presence of color. 

 Summary. 



Acknowledgements. 

 References. 



INTRODUCTION. 



This report presents a method for determining the flight 

 factors of mosquitos. The scheme was developed and tried 

 out on the canal zone and has given results which warrant its 

 publication. Apart from its purely scientific standpoint, the 

 knowledge of the flight of Culices enables us to direct better our 

 efforts toward the eradication of these insects from our habita- 

 tions, and thus greatly reduce the possibilities for transmission 

 of such diseases as yellow-fever, malaria, dengue, etc., and to 

 a large measure do away with the insect as a pest. 



DESCRIPTION. 



Briefly stated, adult mosquitos are bred, colored with an 

 anilin dye and then liberated at stations about the town selected 

 for study. Systematic collections of adults are made in the 

 buildings of this town, and these adults are tested for the 

 presence of color. 



