1903.] NATURAL SCIENCES OF PHILADELPHIA. 101 



test-tube. No further copulation was observed up to 4.20. On 

 June 5, at 12.55 P.M., she having made no cocoon in the meantime, 

 they were again copulating, he using his left palpus continuously up 

 to 2.10, then his right from 2.10 to 3.13, after which he ran to the oppo- 

 site end of the test-tube and cleaned his palpi with his chelicera. 



(4) 9 No. 147. May 26, at 2.00 P.M., c?No. 146 approached and 

 seized her, then inserted his left palpus continuously from 2.04 to 3.02, 

 then at 3.02 his right and kept it inserted up to 4.20, when I was 

 obliged to stop observations; they were separated on my return at 

 5.25. 



(5) ?No. 149. At 8.14 P.M:, I saw d'No. 148 come face to face 

 with her, then, each of them tapping upon the web with the first two 

 pairs of legs, they moved backward and forward slowly. This lasted 

 only two minutes, when they both became cjuiet half an inch apart; 

 it was repeated again for a short period at 8.54. On June 1 they 

 were seen in copulation at 4.52 P.M., he inserting his left palpus, and 

 again on June 4, at 11.35 A.jM., continuing up to 11.50, he using his 

 left palpus, and afterward he proceeded to the sperm-induction. 



In this species the male is shaped quite different from the female, 

 and is a little larger (an unusual condition among spiders). There is 

 no true courtship on the part of the male, for his tapping upon the 

 web with his fore-legs is an act w'hich the female also does. More 

 than one copulation may precede the making of a cocoon; and copu- 

 lation may follow cocooning. The longest time a pair was seen in 

 continuous copulation was 2 hours and 18 minutes, the left palpus here 

 being employed for 1 hour and 15 minutes, then the right for 1 hour 

 and 3 minutes. 



Sperm-induction. — This was seen twice: 



(1) d^No. 132 terminated his second copulation with 9 No. 133 at 

 1.35 P.M. After that I watched him continuously with a lens. From 

 2.00 to 2.19 he alternated spinning upon various portions of the web 

 with cleaning his palpi with his chelicera. At 2.20 he commenced 

 spinning over a small area, the diameter of which was not larger than 

 the length of his al^domen, and ceased at 2.22. Half a minute later 

 he bent his abdomen downward and discharged from his genital aper- 

 ture a minute drop of sperm, which appeared to adhere to the delicate 

 web beneath him, and at the same moment reached his left palpus 

 (his right was missing) downward and backward Vjeneath his cephalo- 

 thorax and took this drop into the palpal organ. He then remained 

 quiet up to 1.42, when I stopped observations, occasionally shaking 

 his palpus in the air, but discharging no more sperm. 



