EL Korbatum 1955 Bulfo conurus June 7 Mole A is 25' SW of mike, B 15' behind A, and C over to the right. Square of colle unfort but A usually starts out a series after a period of silence. Once the others are stimulated by A then they seem to have counter effect on A and a real chorus results. Air temp. direct sunlight 1" above soggy meadow 24.5° C. at 1:20 P.M. Water temp. where frogs are 31.8° C. Toward end of tape I sounded a high C on my pitch pipe. Vinylander close use of angling tools which were 10' SW of mike. #8 within couple feet of gun 1/20th at F10 #9+10 (pulled two) " F8 ? #11+12 further away (3-4') 1/100 th at F6. Above gun in angling, I out for eggs collected together. Kaiser Pass mikes. Recording (reel No. 2) includes "release notes" of male subjected to aroma of another male. Twice there were 3 males rolling like a toy wrestling team as they formed a watery "daisy chain", movements of an adjacent male precipitate almost immediate attempt at complex leg ovother. Can female coin a pattern for a strong sign stimulus for sex recognition when males mount any food that moves? From field observation I get impression that the usual stimuli: congruability, movement, lack of wrestling or aggressive - movement being a prime factor. What then is selective