DKATH AND ITS I)IS( ir ISKS. 



i-r. 



during this period, and the leaves were continually dropping from the 

 vine, no change at all of any decided character occurred in the position. 



"Finis!" Tlie lmeS maintained tneir strength and tension. The next day, 

 however, showed a change. "Octoher 22d. This morning the 

 threads of Sexta's web have relaxed and broken, and the position is (jiiih- 

 changed. The abdomen is shrunken up, a mere hard, dry shell. . . . . 

 October 24th. Fearing that Sexta would be carried off by the high wind 

 and falling leaves, and wishing to preserve the body, I removed it from 

 its lines, and the shriveled corpse now rests in my collection at the Phil- 

 adelphia Academy of Natural Sciences. 



I have observed something of the same sort in spiders kept in confine- 

 ment within my breeding boxes, where I had placed them for various 

 observations, particularly to secure cocoons. 

 I was sure to find them some morning lying 

 upon the bottom of the box, quite shriveled 



up and dead. In the case of spiders after 





 the act of cocooning, the process is 



very much as above described, so 



After Co- 

 cooning. 



far at least as I can judge from 



disjointed observations upon various species. 

 Of course, those spiders which make several 

 cocoons remained active until the last cocoon 

 has been spun ; but with those who make 

 but one the forces of life seem to be entirely 

 or largely expended in the act of maternity. 

 After a little while the creature hangs to the 

 maze of lines within which her cocoon is 

 usually suspended, or to some bit of web ad- 

 joining, and then simply drops off dead. As 

 she lies in this attitude the legs are usually 

 bent beneath the body and towards the mouth 

 parts. Sometimes they will be found clus- 

 tered close together just beneath the mouth 

 or some part of the sternum. The abdomen 

 frequently shows gaunt and shriveled. In the case of the spiders above 

 described, who had not made cocoons, the abdomen immediately after 

 death was sufficiently plump, at least not shriveled. Some spiders, after 

 the act of cocooning, have enough energy remaining to spin a web and 

 even capture prey, but with the Orbweavers which make only one cocoon, 

 this is the exception and not the rule. 



II. 



Until lately little has been known concerning the possibilities of pro- 

 longed life among the lower orders of animals. The waste of life is 



FIG. 363. Sexta after death. 



