I8O ARTHUR M. BANTA. 



Experiment 5. n A.M., captured a female which had already 

 deposited the eggs and was leaving the pond. This was used as a 

 decoy and while one male approached somewhat and failed to grasp 

 her the second and third made desperate efforts to get her and 

 the latter succeeded in spite of her diving. The male dived after 

 her but seemed unable to follow her well under water and caught 

 her when she came near the surface and was soon in normal 

 position. 



Experiment 8. Separated a pair and placed the female (still 

 with eggs) on the line. She was soon captured, though she 

 appeared to make every effort to dodge and escape the males. 



Experiment g. A female, a large reddish brown one, was 

 removed from a pair and placed on the line. There was seldom 

 a male lost opportunity to grasp her and two or three would 

 pursue her at once and fight vigorously for possession. Often I 

 pulled her out of the water with a male ventrad and one dorsad 

 though the former always let go before being swung in. Caught 

 as many males as I wished by simply allowing them to grasp 

 her and then swinging her in shore. Hauled in five in this way 

 in less than three minutes and nearly all that time was spent in 

 freeing the female for she was grasped as soon as brought near a 

 male whether she was dorsal or ventral side up, at the surface 

 or almost submerged. An hour later she was killed (pithed) and 

 males seized her apparently quite as quickly and vigorously 

 and struggled quite as hard for possession as before. Later when 

 stripped of her eggs she was seized almost, though I think not 

 quite, as readily as before. But it was getting late in the day 

 and the air was becoming considerably cooler. 



Experiment 10. A dark female captured while leaving the 

 pond on the up-hill side was used as a decoy. This one was so 

 like a male in color, size and general appearances that it was 

 only by examining the first fore toes and opening her that I 

 could be positive of her sex, though I suspected it by the be- 

 havior of the males. It would seem that the frogs could scarcely 

 recognize her as a female by sight. While she was not tackled 

 as often or as vigorously as the reddish brown female (Exp. 9) 

 yet during the hour she was observed she was paired with by 

 five different males, none of which released her except when 

 forcibly removed. 



