Ecological and Experimental Study of SarcophagidcB 59 



One set of Sarcophaga was weighed at two-hour intervals and 

 three sets at tour, six and eight-hour intervals, respectively. After 

 the individuals were well in the pupal stage all weighing was car- 

 ried on every twelve hours until the imagines emerged. 



TABLE III 



Showing the average changes in weight of Sarcophaga sarracenia Riley, from the larva at extrusion 

 to the adult fesh fy (.Set No. 8) 



