334 



HAROLD CUMMINS 



Trap records for certain days were made after and during 

 periods when no calls were heard in the pond. The writer is 

 able to discriminate the voices of the White's Wood species and 

 was at all times on the alert to hear them. The particular days 

 cited below were selected because the night observations as well 

 as those during the day were continuous. Thirty-nine frogs 

 were trapped on March 30th, more individuals than were caught 

 in any other day; in fact, this number is about one-third of the 

 number obtained during the entire period of trapping. Table 3 

 presents the catch of March 30th, the twenty-four hours be- 

 tween 8 P.M. of March 29th and 8 p.m. of March 30th. On 



TABLE 3 



Showing the mimber of frogs of each sex of the four species migrating between 8 p.m. 



of March 29th and 8 p.m. of March 30th, ivith the times of 



collections from the trap on March 30th 



March 29th there was no croaking in the pond until about 11 

 A.M., when an occasional croak of the leopard frog was heard. 

 In the afternoon, and continuing until 8 p.m., the voices of the 

 leopard frog, wood frog, and spring peeper were noted, but the 

 chorus did not continue thereafter. All frogs were silent until 

 about 9 P.M. of March 30th. 



Conversely, the catch of April 1st, while not as small as that 

 of some other days, is interesting because of the relatively small 

 total trapped when climatic conditions were favorable and 

 much croaking occurred. The average temperature and hu- 

 midity for the twenty-four hours ending at 7 a.m. April 1st 

 (table 1) were favorable to migration. The total catch, three 

 female leopard frogs, two female swamp tree frogs, and one 



