Experiments on the Color Sense. 
255 
in another corner. Put her in two inches from the green paper. 
She ran onto it, and stayed on or near it for half an hour, not, 
however, touching the cotton. Once she wandered off in the 
direction of the blue, but soon returned. After an hour and a 
half she went up to the cotton and made three vain efforts to 
get under it, lifting it with her front legs and pushing her head 
under. She then left the green paper. We guided her to the 
blue, which surrounded the true cocoon, but she would not stay 
there. After some wandering about she went on to the green 
again and once more tried to get under the cotton. We then 
pushed her on to the blue and she ran to her nest and seemed 
to be trying to get in, for a moment, but then ran away. We 
tried several times afterward to make her go back to her eggs, 
but in vain. 
Astia vittata. 4. This spider was put into a box which had 
been papered with the four colors, as in the last experiment, 
and she also laid her eggs in the green corner. 
On July 27, 28 and 29 she was pushed from her nest and al¬ 
lowed to find her way back over the green. 
July 30. The spider was taken from the box while red paper 
was substituted for the green around her nest, the green being 
transferred to a false nest in another corner. She was then 
put in at a distance of three inches from the green paper. She 
moved toward it, and stayed near it or on it for half an hour, 
looking at the cotton but not touching it. She then made many 
attempts to get under the cotton, walking over it (with difficulty) 
and pushing her head and first legs under the sides. She finally 
settled down under the edge of the green paper. At the end of 
an hour and a half she was guided gently to within three inches 
of the red paper. She looked toward it for a few minutes and 
then turned away. She was then guided to within two inches 
of it. She again looked at it, but left it, returning to the 
neighborhood of the green. After some time she crept on to it 
and tried again to get under the cotton. She was then guided 
to the edge of the red paper. She looked toward her nest but 
then turned away. She was then pushed to within half an 
inch of her nest when she ran to it, and beat it excitedly with 
her first legs. She then left it and ran to the further side of 
