THE PHOTIC REACTIONS OF SARCOPHAGID FLIES 219 



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24 



2S) 



Fig. 16 L. caesar. Random movements under an intensity of 0.007 C. M. 



Fig. 17 L. caesar. Random movements under 0.56 C. M. 



Fig. 18 L. caesar. Random movements under 325 C. M. 



Fig. 19 L. caesar. Random movements under 960 C. M. 



Fig. 20 C. vomitoria. Random movements under 0.56 C. M. 



Fig. 21 C. vomitoria. Random movements under 64 C. M. 



Fig. 22 C. vomitoria. Random movements under 325 C. M. 



Fig. 23 C. vomitoria. Random movements under 960 C. M. 



Fig. 24 Ramdom movements of C. vomitoria in total darkness for one minute. 

 The larva is undirected. Rest is the usual state under such conditions, but me- 

 chanical stimulaton due to handling caused the larvae to be restless and to produce 

 random movements. 



Fig. 25 C. vomitoria. Randon movements under 0.14 C. M. 



