92 PROCEEDINGS OF THE ACADEMY OF [Jan., 



away. On the early morning of July 22 she made a second cocoon 

 when there were no nest lines in the cage; on August 9 she fastened it 

 to the roof of the cage, cut it open with her jaws so that the young 

 emerged, and in the succeeding days built a web-nest around it. 



From these few observations we may conclude that the cocoon is 

 made first, that the mother most carefully holds it until the time 

 for hatching, when she cuts it open and then spins the ^^^b-nest around 

 it This method of holding the cocoon, and of guardmg the >oung 

 upon a nest instead of carrying upon her body, is shared by our loca 

 Dolomedes urinator Hentz, but is different from the usage of the other 

 Lycosid genera. These web-nests are generally found on he top ot 

 plants along the sides of wooded streams, and have a decided resem- 

 blance to the nests of Lepidopterous larva?. 



Tegenaria derhami Scop. 



Individuals observed, males: No. 23, captured May 2 escaped May 22; No 74 

 captured May 13, died (from starvation) June 5; No. 80, captured May 14, kd ed 

 May 27; No' 178, captured June 5, died July 24 No. 218, captured W 9 

 died abmxt September 1; No 221, captured June 19, died July b. No. -o-, cap 

 tured June 26, killed (by ^ No. 25) the same day. 



Ind^riduals observed, females: No. 22, captured May 2, died Ma> 21 No. 5, 

 captured May 2, died August 4; No. 75, captured May 13, died August 19 

 nT. 79, captured May 14, died September 1; No 84, capture^ May 15 kill d 

 May 25; No. 117, captured May 24, died about September 10 No. 118 /^^P^^;^^^ 

 May 24 escaped June 5; No. 219, captured June 19, died in December, No. 220, 

 captured June 19, died the first week of September. 



Moulting. -Tl^is was seen only once; the moulted skin was split in 

 the horizontal plane as in other spiders. 



Mating.-The mode of observation was to put a male upon the 

 web of the female, and the male was in most cases left with her and 

 not removed, since removal would necessitate a breaking of the web 

 The male is of about the same size and strength as the female, and 

 the two generally live peacefuUy together. Sometimes the male is 

 the more aggressive and secures all the food placed in the cage, but 

 more generally the female lords it a little over the male. The following 

 are my main observations on the approach of the male and the 

 mode of copulation: , o .i 



(1) On to the web of 9 No. 22 I placed d^ No. 23 on May 3, at 2.41 

 P M They touched each other a few times, then remained motion- 

 less facing each other from 2.49 to 3.02. Then she moved toward 

 him and followed him slowly, she finally touched him and he moved 

 away Then both remained immovable until 4.00, when I removed 

 him On May 3 I put him in again at 9.15 P.M.; he touched her, 



