THE MIGRATION OF THE FLY LARVAE 



315 



Table IV— Continued 



It ma}^ be of interest to note that there seems to be, as the 

 preceding tables indicate, no correlation between the rate of 

 migration and the distance traveled by the larvae resulting 

 from two types of oviposition or between those larvae which 

 died on the leaf and those that successfully reached the base 

 of the plant. The maximum and minimum rates of migration 

 when eggs are laid normally and when they are deposited in an 

 inverted position are shown in Tables V and VI. Part 1 of 

 each table gives the maximum and minimum average rates of 

 migration with the distance traveled, while part 2 shows the 

 maximum and minimum distance traveled. 



TABLE V 



Maximum and Minimum Rates of Migration of Larvae when Eggs 

 Are Laid in Normal Manner 



Part 1. — Maximum and minimum average rates of migration and distances trav- 

 eled at these rates: 



Average time 



Larva required to Distance 



No. move 1 mm. traveled 



Larvae that got down into sheath .... 

 Larvae that died on leaf 



Part 2, 



-Maximum and minimum distances and rates of migration used to travel 

 these distances : 



Average time 

 Larva required to Distance 



No. move 1 mm. traveled 



Larvae that got down into sheath .... 

 Larvae that died on leaf 



