88 PROCEEDINGS OF THE ACADEMY OF [Jan., 



followed the oviposition, lasting not quite 2 minutes, in exactly the 

 same manner as in the preceding case, except that 33 or 34 oysl were 

 discharged into the viscid drop. The ova sank one by one into this 

 drop so as gradually to fill it and increase its size, but by virtue of its 

 viscidity it still retained its globular form and surrounded them all. 

 At 5.08 she started spinning the cover, finished it at 5.20, and in the 

 time from 5.21 to 5.25 cut the cocoon loose from its scaffolding by 

 tearing the surrounding threads with her chelicera. She then brought 

 the cocoon below her cephalothorax and spun upon it; at 5.28 sus- 

 pended it from her spinnerets and ran about, and at 5.34 spun upon 

 it again. The fact that her cage had been kept in a dark drawer 

 might account for the cocooning in the afternoon. For her second 

 cocoon (finished July 3) she commenced the scaffolding on July 2. On 

 July 3, at 9.50 P.M., I found her in process of finishing the circular 

 base, and here I observed an action that I had probably overlooked 

 in the case of the other cocoons ; when- the white discoidal base was 

 clearly outlined upon the scaffolding she spun, upon its margin only, 

 long curled threads, each made by attaching her spinnerets to one point 

 of the margin, then elevating them and attaching them again close 

 to the first point of attachment; thus she made a marginal wall, just 

 sufficiently elevated to be seen with the naked eye. From 10.01 to 

 10.06 she worked upon this wall. Then the oviposition followed 

 upon the centre of the base from 10.07 to 10.10^. From then until 

 10.20 she started covering the egg mass with high uplif tings of the 

 spinnerets, thus laying down loops of threads, and from 10.20 to 10.24 

 with brushing movements of the spinnerets. From 10.24 to 10. 26^ 

 she occupied herself in biting the cocoon loose. Then she held the 

 cocoon below her and spun upon it until 11.07, when she attached it 

 to her spinnerets. 



9 No. 63 I found at 7.15 P.M., June 7, laying the covering upon 

 the egg mass. She cut the cocoon loose at 7.23, at 7.24 walked about 

 with it attached to her spinnerets, but at 7.26 held it below her again 

 and spun upon it until 7.59. At 8.04 she attached it to her spinnerets 

 again for a couple of minutes, then commenced to spin upon it 

 again. 



9 No. 61 was unsuccessful in her cocooning; at 10.30 P.M., May 11, 

 I found her holding beneath her cephalothorax a misshapen object, 

 bowl-shaped and of a bluish color, evidently a miscarried cocoon; 

 she tried in vain for a long time to spin upon it, and finally dropped it. 



Thus the nearly globular cocoon is formed from two separate 

 pieces. 



