404 



PECKHAM. 



[Vol. 



second attempt we turned to the spiders that are found during 

 the day, running among dead leaves or hiding under stones or 

 wood. 



In July last we constructed two cages in the following man- 

 ner: On a base of wood we placed a row of four pieces of 

 differently colored glass, each four inches square, held upright 

 by slender nails on the inner and outer sides of each piece ; and 

 parallel to this, four inches away, a similar row. The ends and 

 roof were formed by squares of glass which matched in color 

 the parts of the sides which they touched. Thus we had a cage 

 sixteen inches long by four inches wide, and four inches high, 

 formed of four differently colored compartments all opening 

 freely into each other. The cages were placed on a table in a 

 covered porch with the wall of the house to the east, while the 

 south, west, and north sides were exposed to the light. 



On July 1 8 we placed a spider {Lycosa nigroventris Emerton) 

 in a cage with the order of colors as in the following diagram : — 



Figure i. 



Blue. 



Red. 



Yellow. 



Green. 



After walking about for a time, remaining in no spot more 

 than a few moments, it at last settled down in the green com- 

 partment at one end of the cage, where it remained without 

 change of position for several hours. Being satisfied that it 

 had given up all efforts to escape, we now began our experi- 

 ments by lifting off the green roof-plate, and gently driving the 

 spider into the blue compartment at the other end. (Hereafter, 

 to avoid circumlocution, we shall designate the compartments 

 by their colors, — red, blue, green, and yellow.) 



After an interval of thirty minutes it was found in the red. 

 It was driven into the yellow, but after fifty minutes was again 

 found in the red. It was then driven into the green, where it 

 remained for half an hour, when it was driven into the blue. It 



