Hyla cinerea 263 



mm. On June 21, 19 17, at Devers, Texas, we captured a gravid female. 

 On June 30, 192 1, a female 56 mm. was not quite ripe. On July 3, 192 1, we 

 have two spent females. 



This evidence of 191 1, 19 17, and 192 1 yields the facts that breeding began 

 before April 28 and reached at least to July 3. The gravid females recorded 

 above for the period after July 15, 19 12, send the ovulation far into July. 

 From spent and unspent females evidence, mating pairs, actual eggs recorded 

 and early and late choruses this species may lay at least from mid April to 

 mid August or later. 



Temperature and humidity. In the six or seven instances of ovulation or 

 mating in 1921, we have a rain of .88-2.80 inches before or .84-1.00 the day 

 of the record. On the day before the record the maxima ranged from 75°-9i°, 

 the minima 60^-74°; on the day of the record, maxima 8o°-9i°; minima 62°- 

 70°. Close study of these temperatures shows 65°-76° minima prevalent 

 when ovulation occurred. 



On May 16, 192 1, when we had an immense chorus we made the note 

 "The humidity, previous rain and threatening rain must be more of a factor 

 than temperature." 



Egg-laying process. In 19 12 if the presumptive egg packets (June i, 

 191 2) of 5-30 eggs were H. cinerea these must be moving about as in Hyla 

 versicolor, Hyla femoralis and some others. Then we held that each female 

 if she lays packets of only five each would have about 70-100 packets to lay 

 or if in masses of 30 each about 10-16 different ovipositions. In 192 1 on May 

 23 when we found them in the field sometimes the packets seemed distinct 

 and other times not so much so. The eggs might be more or less strewn on 

 the vegetation or at other times be in packets. Then we noted on the spot 

 that all the complement apparently is not laid at the same place or time; there 

 is some moving about. Possibly its method may be somewhat akin to that 

 described by Noble and Noble for Hyla andersonii where it strews its eggs on 

 the sphagnum. 



The eggs laid May 18, 192 1, were not hatched May 24, 192 1. They 

 eventually spoiled. Doubtless this means they were laid by the female when 

 not mated. On July 9, 192 1, we also recorded that the eggs laid by the pair of 

 July 4 did not hatch. Here also they were doubtless laid when not paired. 

 If each case represents infertility from male it may be the captivity, restricted 

 quarters where there is little opportunity to move about. 



EGGS 



Attachment, egg mass. The first eggs laid by the pair of May 18, 192 1, 

 were deposited in our photographic jar and give no idea of the mass form in 

 the field. In the illustration they appear as a flocculent mass of eggs. 



In 19 1 2 we made these notes on the eggs of this species: "On June i, 19 12, 

 Dave Lee found some amphibian spawn in some pools of their clearing. 

 These pools were near the swampy thicket around the edge of the cultivated 

 corn and chufa's fields and were decidedly transient in nature. The eggs 

 were in masses on the surface of the water more or less like tree toad {Hyla 



