88 



A. S. PEARSE 



Black background 



July 12 



6.45 A. M. Nothing on any. 



10.45. 0^^6 black paper on 

 one individual; the others, 

 nothing. 



2.15. Same. 



White background 



July 12 

 6.45 A. M. Nothing on any 

 of the animals. 



10.45 A- M.-2.15 p. M. Same. 



Five other experiments of the same nature were performed 



and they are summarized in Table III. The results show little 



evidence of discrimination between white and black. There 



is a rather noticeable predominance of selections of black on a 



black background but this is due mostly to the selection of 



six black papers by one individual in Experiment 3. The matter 



seemed worthy of further investigation, however, and another 



set of experiments was carried out; these are described in the 



next section. 



TABLE III 



Showing the Results of Allowing Libinl\s to Decorate with Black and 



White Papers While Resting on an Entirely 



Black or White Background 



Background . . . 



Papers selected 



Experiment 1. 

 Experiment 2. 

 Experiment 3. 

 Experiment 4. 

 Experiment 5. 

 Experiment 6. 

 Experiment 7. 

 Experiment 8. 

 Experiment 9. 

 Experiment 10 



Total 



Black 



White 



Black 





 3 

 9 

 1 

 1 

 

 3 

 

 3 

 



20 



White 



Black 







2 



1 

 2 





 4 

 

 

 

 



5 

 3 

 2 





 

 

 

 

 



10 



White 



5 

 5 

 3 

 

 

 

 

 

 



13 



(b) Color Discrimination. — The experiments to be described 

 here were carried out in the same manner as those considered 

 under black vs. white discrimination (p. 85), except that papers 

 of four colors were put in the dishes, and six dishes were used 

 instead of two, four of the dishes being covered with colored 

 papers. The colors used corresponded with the following numbers 



