1903.] NATURAL SCIENCES OF PHILADELPHIA. 93 



she instantly turned and faced him, their fore-legs almost in contact. 

 They remained in this position until 9.29, he tapping the web a few 

 times with his palpi, while she shook the web vigorously with her left 

 fore-leg for a couple of seconds. At 9.30 he rubbed his palpi vigor- 

 ously with his fore-legs, then approached and copulated, this act 

 lasting only 5 seconds. Their exact position in the act was not 

 determined. I could only observe that he approached head on with 

 one palpus outstretched, they mutually grasping each other with 

 their first pair of legs, both in their usual position on the upper surface 

 of the web. She then moved away. At 9.35 he walked over her 

 without copulating. At 10.25 she approached and tapped him sev- 

 eral times with her left fore-leg, and again at 11.02. I watched them 

 continuously up to 12.27, then left him with her. Up to May 21, when 

 she died (he securing most of the food given them), I watched them 

 many times, saw him on some occasions approaching her with shaking 

 palpi, but observed no further copulation. 



(2) To ? No. 25, after she had made 3 cocoons, I introduced d^ No. 

 225; she chased and killed him. 



(3) 9 No. 79 had made 3 cocoons, when c? No. 178 w^as introduced 

 on June 19, at 9.15 P.M. He moved toward her very slowly, a step 

 of a centimeter each time, slowly and cautiously tapping the web 

 with his palpi; he took about 9 minutes to cross a distance of 2 inches, 

 and then when he had almost reached her, she rushed at him and 

 drove him away. At 9.35 he again approached cautiously, and at 

 9.50 rushed at her, but she repelled him. At 9.57 he advanced again, 

 at 10.10 making a cpiick rush at her and almost succeeding in inserting 

 an extended palpus in her epigynum, but she escaped from him. 

 No copulation was seen up to 11.25. 



(4) 9 No. 117 made her first cocoon on June 10. On June 19, at 

 9.40, c? No, 221 was placed on her web. At first she chased him about, 

 then both became quiet. At 10.01 he quickly ran at her, and copu- 

 lated with his right palpus from 10.02 to 10.03, for ten minutes after 

 which she chased him about the cage. The copulatory position was 

 the same as that of ? No. 75 X cJ" No. 218. 



(5) ? No. 75, after making 2 cocoons, mated with d"' No. 218 on 

 June 19. He was introduced at 9.08 P.M., and shortly after she chased 

 him. At 10.00 he made a sudden move toward her and succeeded 

 in copulation; he inserted his right palpus into her epigynum for 1 

 minute, his left for 15 seconds, his right again for a minute and a half. 

 Position: the male braced himself firmly on all legs upon the web, 

 and reached his palpus straight out before him and pressed it into the 



