64 PROCEEDINGS OF THE ACADEMY OF [Jan., 



was put in for more than an hour; he courted with interruptions, she 

 would sometimes jump at, sometimes run from him. On June 5 the 

 same male was introduced at 5.00 P.M. He immediately commenced 

 his courting motions and came close to her, when she jumped at him; 

 he turned away and walked around the cage, still courting, came 

 back face to face with her ; she lowered her outstretched fore-legs, bent 

 her head to the ground, and he embraced her and commenced the 

 copulation. The attitudes were as in the case of cJ No. 151, 9 No. 36. 

 The copulation lasted from 5.02 until 6.17 P.M., that is 1 hour and 

 15 minutes; the palpi were quite regularly alternated, the right used 

 12 times and the left 13 times. The male then rose and left her, and 

 was removed; the female remained in the same position until 6.24. 

 In the early part of the copulation the palpus was kept inserted for 

 4-5 seconds; in the latter part, for 20 seconds. 



(4) 9 No. 184 made her cocoon on June 29. and so was pregnant 

 when I introduced c? No. 151 on June 12 and 13 ; both times she reacted 

 hostilely to his courtship. 



(5) ? No. 237 was parasitized. On June 22, 23 and 26, o'' No. 236 

 was introduced and courted each time, but she was hostile. In his 

 courtship both legs of the first pair were not alwaj^s moved in unison, 

 but sometimes alternately. 



(6) 9 No. 239 was also parasitized. On June 22, 23 and 24, c? No. 

 238 was placed in her cage and he courted, but she repulsed him each 

 time. June 26 d" No. 236 (just after his courtship of ? No. 237) 

 courted her, but in vain, and this was the case with c? No. 238 on 



July 1. 



(7) 9 No. 241, likewise parasitized, c? No. 240 was introduced on 

 several occasions, but though he courted there Avas no response. 



(8) 9 No. 244 was not mature, and males Nos. 267, 284 and 326 

 when introduced did not court. 



Thus there is quite a distinct courtship l^y the male of the mature 

 female, even when she is pregnant. The courting motions are modi- 

 fications of the cautious feeling motions ; the stretching out of the first 

 pair of legs enables the male to feel and so to guard himself. Even in 

 his ardor, then, the instinct of caution toward a stronger individual 

 is not lost. When the female stands high upon her legs and stretches 

 out her fore-legs, it is the same attitude of guard but with offensive 

 intent; a frightened female, Avhcn attacked by a stronger individual, 

 does not make use of this attitude, but slinks away. The female shows 

 her willingness to the male by depressing these fore-legs. The bristly 

 tibiffi of the male are shown off l^y the courting movements of the male ; 



