,Qg PECKHAM. [Vol. i. 



On the following day we kept the cocoons away from three 

 spiders of the same species for thirteen, fourteen and a half, and 

 sixteen hours, respectively. All remembered them and took 

 charge of them when they were returned. From the same 

 spiders we again removed the cocoons, keeping them, this time, 

 for twenty-four hours. The spiders again picked them up. 

 There seem to be individual differences in the depth of feeling 

 experienced by these spiders, since one female of this species 

 utterly refused to take back her cocoon, after an interval of 

 twenty-four hours. 



We repeated the experiment with the three Lycosids mentioned 

 above. Their cocoons were kept away from them for twenty- 

 four hours, and then restored. Two of them refused to resume 

 their maternal duties, seeming not to recognize their cocoons ; 

 the third, after hers had been placed in front of her seven 

 times, slowly resumed charge of it, but with none of the eager- 

 ness before displayed. 



In the following summer, on July 14, we took the cocoon 

 from a female of Lycosa (sp. ?) She recollected it and promptly 

 took it up after having been separated from it for one day. We 

 kept the eggs away from a second individual of this species for 

 forty-three hours. When it was restored she had apparently 

 forgotten all about it, since, although she touched it five 

 times with her legs, and we four times placed it directly under 

 her, not until the fifth time did its presence recall her to a sense 

 of duty. She then very slowly and languidly took it up and 

 attached it to the usual place. From another individual of the 

 same species we kept the cocoon forty-eight" hours ; but the 

 little spider could not remember so long, and, although we 

 worked long and patiently to make her recollect, she would 

 have nothing more to do with it. 



Pardosa pallida Emerton was also separated from her cocoon 

 for forty-eight hours. We tried for thirty minutes to make her 

 take it back, but failed. She held it under her legs and palpi 

 five times, several seconds at a time, seemingly feeling of it, and 

 then left it. 



Notwithstanding many efforts we never found a spider among 

 the Lycosidas that was constant in her affection for so long a 

 period as forty-eight hours. A female of Clubiona pallcns 

 Hentz, however, remembered her eggs for this length of time, 



