LIGHT REACTIONS OF TERRESTRIAL AMPHIPODS 



347 



The insect would stop when it began to go to the side, correct 

 its course and travel on. O. traskiana and 0. pugettensi acted 

 in much the same manner. At times 0. traskiana appeared 

 to be using all its powers of control to keep from turning to the 

 side. The body would curve to the side, but the antennae 



Figure 1. Paths of O. traskiana with right eye blackened. O. traskiana No. 1 

 turning toward blackened eye. Starting point at bottom of figure. Dotted 

 lines indicate jumping toward light. Consecutive paths are numbered. 



would be extended bravely toward the light as if to help the 

 creature to keep in the straight path. That there was effort 

 to control its course was so visible as to be almost convincing. 

 When specimens found themselves curving away from the light, 

 they would stop, right their position, and go on. I did not notice 

 that this happened more than once in one trial. The gradual 

 straightening of the path occurred in specimens that travelled 



