It is apparent that air maxima vacillate backward and forward more than 

 the air minima. In the above tabulation there is a steady climb of the range 

 average of minima. 



This table might permit of the interpretation that Acris might breed at 50° 

 or 54° or 59° with rains prevalent. But the author believes 62° — 72° or 62°— 

 69° the optimum or prevalent influential minima in starting vigorous breed- 

 ing from the last of April to July i. 



Egg-laying process. Of the first pair which laid May 15, 192 1, we made 

 these notes: "Surely the pair doesn't occupy one position but moves about 

 with each oviposition. It could not have occupied one position above the 

 stick for eggs to be placed on the stick as they are, i. e., for eggs to drop down 

 from one position. These were never laid in one mass. Neither are they thus 

 from the pair breaking up the mass from excessive activity in confined quar- 

 ters." We did not observe the actual egg-laying but suspect they are somewhat 

 of the Hyla criicifer type. 



On June 4 we have the information that the "two mated pairs of Acris 

 found June 3, 192 1, laid eggs. One female at least. Believe she laid them 

 without an embracing male." Three days later June 7 have a similar note 

 "Female frogs laying without a male. On night of June 3, a female of a 

 previous pair laid a complement without an attendant male. Previously an- 

 other female Acris has thus done." 



We suspect most of the eggs are normally laid at night. For example, a 

 mated pair caught the night of June 24 were separated and the female had 

 laid eggs before morning, and in the field most of the breeding activity comes 

 at night. 



EGGS 



Egg moss, egg description. Abbott (1882, p. 707) is the first to speak of 

 their eggs which "were deposited in httle masses, attached to the blades of 

 course grass." 



Dr. K. V. (Katherine Van Winkle) Palmer who worked over our Acris 

 collections and the 19 17 transcontinental material found that in an Ames, 

 (Iowa,) congress of Acris June 12, 1926, that some eggs tended to be in 

 bunches or masses. 



In 191 7 at Dinwiddie, Va., we found this species breeding. Of it we write 

 in 1920 (p. 29) as follows: "The writer recently found them breeding actively 

 on June i. They had chosen a shallow (i to 4 inches deep) grassy meadow 

 pool (PI. X, fig. i). The eggs were attached singly to sedge stems or were 



