374 Frogs of the Okefinokee Swamp 



Concluded I might mate them. Brought them back and put them in a fish 

 can (absolutely dark within)." The following morning we noted "This 

 morning at 6 the Rana grylios were mated." We tried later to photograph 

 them but they broke the embrace. 



One journal entry is our only evidence. On May 21, 192 1, we have 

 "After supper I went down to Billy Lake Landing. R. grylio going strong. 

 Air 7o°F. at 7 p.m. Tonight at 8 we went to Chorophilus pond and Engy- 

 stoma ditches. Air 70°. In the bays around Billy Lake at 12 midnight a 

 wonderful R. grylio chorus. In the Engystoma ditches caught a female R. 

 grylio which was in the middle on trash. She jumped towards the vicinity 

 of a male. Caught her. Later caught a male. Put them together. He mated 

 axillary. Later with one arm behind and one ahead of forearm. Once his 

 finger seemed to extend down as in a normal Rana male but this is normally 

 axillary in this male." 



OVULATION 



Habitat. (See non-breeding habitat.) 



Period. In 19 12 report we note of our 7 specimens only two are adult 

 females. One was taken on the Suwannee River, June 17, and the other on 

 Floyd's Island Prairie June 26, 191 2. Both were spent and this would indicate 

 earlier breeding. It appears that the breeding may come in May and through 

 June because of the chorus June 18 and the fact that males taken from June 

 1 5- July 15 or even later had the first finger strongly swollen. At the herony 

 we took tadpoles 18 mm. long which we took to be this species." In 1923 the 

 author reported (Copeia, 1923, p. 34) R. grylio as one of five species to begin 

 breeding from May 15 on to June i. In July- August 1924 (p. 379) Mrs. 

 Wright and I pronounced the "Season, May 24 to August 21." 



Inasmuch as we not uncommonly hear them in chorus or abundance until 

 September i just before darkness comes on, all through the night and at day- 

 break we suspect this species to breed until September i. Our latest record 

 of numbers comes September 5. We actually found eggs on May 24, 192 1, 

 May 28, 1921, June 8, 1921, June 10, 1921, July 28, 1922. 



Temperature and humidity. On May 24, we found our first masses. My 

 records for that day are somewhat as follows: "In Long Pond this morning 

 I found where we formerly photographed the male R. grylio, two masses of 

 R. grylio eggs. They were about ready to hatch. Must have been laid the 

 night of May 21-22 or that of May 20-21. In another place in middle of 

 pond found two more masses probably laid night of May 22-23. At 10:30 

 a.m. temperature in air i foot above water 94°, water's surface 85°. The Cox 

 boys report having found May 2 1 in afternoon a fresh mass of R. grylio eggs 

 along the edge of Billy's Lake." This coincides with our belief for the ovula- 

 tion of the record for May 24. On May 2 1 it rained continually in the swamp; 

 our temperatures were not below 70°; those outside ranged from 67-80° and 

 rain was general at St. George, Hilliard, Waycross, etc. The temperatures 

 for localities outside the swamp for four days preceding May 24 were minima 

 62-69°, maxima 78-94°, our temperatures 64-94°. 



