SPIDERS AND WASPS. 93 



In confinement the female tiger-spider will kill and 

 eat the male, but the tower-builder has no such wicked 

 tendency ; the two live in perfect harmony. I soon in- 

 troduced a male into the jar with the female' that I capt- 

 ured in July, but he would not build for himself, nor 

 would he assist her. He often seemed to be watching 

 her movements, and would go up on her tower and look 

 down, but I never saw him venture within her burrow. 



Towards the last of July the female appeared with 

 a cocoon of eggs about as large as a hazel-nut attached 

 to the spinneret. I now set the male free, and he dug 

 a burrow not more than two rods distant from where 

 I liberated him. His tower is not so fine as the fe- 

 male's, and as yet it is only about an inch above the 

 burrow, and he has been at work on it for two months 

 or more, but meanwhile two disasters have happened 

 to it — probably some bird, catching a glimpse of the 

 builder, demolished the structure in the vain hope of 

 capturing him. 



The female in the jar exercises the greatest care over 

 her cocoon. On cool days she keeps out of sight down 

 in her tube, which is now about eight inches in depth, 

 including the tower ; but when I set the jar in the sun, 

 she soon comes up and puts the cocoon in the sunshine. 

 When cool enough for a fire, if I set the jar near the 

 stove, she- places the eggs on the side next to the stove ; 

 if I turn the jar around, she soon moves the cocoon 

 around to ie warm side, letting it hang outside the 

 walls of her tower. 



