Ecological and Experunental Study of Sarcophagidce 57 



reduced to ten larvae in a set. Six of these sets were Lucilia and 

 the remaining four Sarcophaga. Weighing began shortly after 

 the larvae emerged from the eggs, July 13, and continued at regu- 

 lar intervals during the entire period of development. Eggs and 

 larvae were first weighed at extrusion. 



TABLE I— Continued 



Four sets of Lucilia were weighed at two-hour intervals for 

 twenty-four hours and the interval increased two hours for each 

 succeeding twenty-four hours until migration. Another set of 

 the same species was weighed at five-hour intervals throughout the 

 larval period to migration, and another set at ten-hour intervals. 



