102 PROCEEDINGS OF THE ACADEMY OF [Jan., 



(2) cJ'Xo. 148, on June 4, ceased his copulation with ? No. 149 at 

 11.50 A.M. About 4 minutes afterward he started spinning on the 

 glass wall, not using his calamistra, and made a close but scarcely 

 visible silk sheeting at one place. This continued up to 12.05 P.M., 

 when he stood over it, shaking his palpi and rubbing them against his 

 chelicera. At 12.10 a minute whitish globule of sperm fell from his 

 genital aperture upon the silk sheeting, rolled forward upon it (i.e., 

 toward his head), and was immediately taken into one of his palpal 

 organs, and that palpus was then shaken repeatedly many times. 

 After that he remained in the same position, flexing his palpi and 

 pressing them against the silk sheeting. But there was no further 

 discharge of semen, though I watched him continuously with a lens. 

 He spun again in another place from 12.20 to 12.27, then went off to 

 feed upon a fly. 



The peculiarity of the sperm-induction in this species is its rapidity, 

 and the fact that the palpi are not placed beneath the silk layer made 

 to catch the drop of sperm. 



Cocooning. — This process was not seen, most of the cocoons having 

 been made in the early morning. Only the conclusion of it was noticed 

 in a couple of cases, i.e., the finishing of the cover of the cocoon; silk 

 was applied that had been drawn out by the calamistra from the 

 cribrellum. And female No. 131 was seen standing over a flat circular 

 disk of silk one day at 12.00 P.M., and sometime before the next day 

 she oviposited upon it and spun another disk as a cover ; this observa- 

 tion shows that this species, as other spiders, makes her cocoon of a 

 base and a cover. 



The number of cocoons made, and their dates, were as follows : 



(1) 9 No. 131 : June 4, June 7. 2 cocoons. 



(2) ?No. 133: June 4 (hatched June 23); June 9; June 17; June 

 20. 4 cocoons. 



(3) ? No. 135: June 8 (hatched June 22); June 9; June 13; July 5; 

 July 8; July 9; July 11; July 15; July 31. 9 cocoons. 



(4) ?No. 137: June 10 or 11 (hatched June 24); July 3; August 3; 

 August 19. 4 cocoons. 



(5) 9 No. 141: July 3; July 7; July 13; July 26. 4 cocoons. 



(6) 9 No. 143: July 4; July 24. 2 cocoons. 



(7) 9 No. 145: July 10; July 15; July 24; July 30; August 11. 

 5 cocoons. 



(8) 9 No. 147: June 4 (hatched June 18); June 6 or 7; June 17 

 (hatched July 3); June 22; July 4; July 18; July 27. 7 cocoons. 



