June, '16] PARKER: DISPERSION OF MUSCA DOMESTICA LINNAEUS 335 



Longest distance at which recaptured within city hmits, 1,966 yards. 

 Recaptured 700 yards beyond city Hmits on same side of city. 



Sales Yards Series 

 First lot of flies released, July 20. 

 Last lot of flies released, August 16. 

 Number of lots released, 23. 

 Total number of flies released, 248,140. 

 Number of Sales Yards flies recaptured, 667. 

 Number of stations at which recaptured, 62. 



Longest distance at which recaptured within city limits, 2,200 yards. 

 Longest distance at which recaptured, 3,070 yards (this was 700 yards 

 beyond city limits on opposite side of city). 



City Dump Series 

 First lot of flies released, July 21. 

 Last lot of flies released, August 12. 

 Number of lots released, 10. 

 Total number of flies released, 54,500. 

 Number of City Dump Flies recaptured, 69. 

 Number of stations at which recaptured, 20. 



Longest distance at which recaptured within city limits, 2,333 yards. 

 Longest distance at which recaptured, 3,500 yards (nearly 2 miles). 

 This was 700 yards beyond city limits on opposite side of city. 



Washingto7i School Series 

 First lot of flies released, Julj^ 23. 

 Last lot of flies released, August 12. 

 Number of lots released, 9. 

 Total number of flies released, 45,000. 

 Number of Washington School flies recaptured, 78. 

 Number of stations at which recaptured, 20. 



Longest distance at which recaptured within city limits, 1,230 yards. 

 Longest distance at which recaptured, 2,000 j-ards (this was 700 yards 



beyond cit}' limits). 



This station was centrally located within the city, hence recaptures 

 within city limits could not be at such great distances as from the other 

 release points. 



Combined Data for All Release Points 



First flies released, July 12. 

 Last flies released, August 16. 

 Total duration of experiment, 39 days. 

 Total lots of flies released, 68. 



