Hyla cinerea 267 



In 1922 by living on Chesser Island we secured less of this species and 

 Rana grijlio but 192 1 we used to secure these two tadpoles in considerable 

 numbers in the floating islands of vegetation along the edge of Billy's 

 Island. We would haul the vegetation into the boat. Tadpoles of these two 

 frogs Hyla cinerea and Rana grylio were the commonest anurans. In 1922 

 we had great difficulty in separating young Rana grylio tadpoles from mature 

 Hyla cinerea tadpoles. 



In 1922 the mature tadpoles were mainly taken in July and in 1922 we 

 recorded them July 24 and August 11. This seems to imply ovulation mainly 

 after the first of May. 



LARVAL PERIOD 



In 192 1 fully grown tadpoles were captured in July. The first eggs we 

 recorded were May 18, 192 1, and the first mated pair May 10, 192 1. The 

 first recorded transformation in 192 1 is July 12. This might imply 55 to 63 

 days for larval life. 



TRANSFORMATION 



Period. In 192 1 most of the tadpoles of July 25 implied transformation 

 August I and later, although six were actually at transformation. In 1922 

 mature tadpoles were recorded as late as July 24 and August 11. This im- 

 plies transformation in August or as late as September i. Surely eggs laid 

 July 3, 192 1, could not transform short of the last of August or September i. 

 Our latest date of transformation is October, 191 5. This must be from eggs 

 laid by August breeders. In 191 2 we recorded one July 2 from Minne Lake. 

 Our range of dates is from July 2 to October. July and early August doubt- 

 less are the crest of transformation. 



Size. Our data are meager. In 19 12 one transformed frog measured 12 

 mm. One taken October, 191 5, was only 11.5 mm. The lone specimen of 

 192 1, July 12, is 15 mm. In Long Pond, Billy's Island, July 25, 192 1, we 

 took six transforming frogs, 16, 16, 16, 16, 16, 17 mm. respectively. One or 

 two tadpoles (July 25, 192 1) which were almost at transformation measured 

 16 mm. On July 26, 192 1, in a smaller place we found a tadpole a very few 

 days from transforming and 17 mm. in body length. Possibly 11.5 mm.-i7 

 mm. fairly outlines the transformation size. 



GROWTH 



In October, 1915, we recorded a 11.5 mm. transformed specimen and 

 October 9, 1906 a set of three 25, 27, 30 mm. respectively, two size groups. 

 Several isolated transformed records of 12, 15, 16, 17 mm. respectively were 

 made. In one set from Florida we have a 14 mm. and 20 and 26 mm. speci- 

 men — two groups. Another set has 23, 24, 24 mm. specimens and a 33 mm. 

 individual, possibly two groups. From Pass Christian, Miss., June 14, 191 7, 

 we have the following at 36, 38, 39, 41, 41, 42, 45, 45, 46, 46, 47, 48, 48, 48 mm. 

 respectively. On July 15, 19 16, we have some more specimens from the 

 same size group: 35, 36, 36, 37, 38, 38, 38, 39 mm. respectively. On July 14, 

 191 5, four specimens are at hand, one 38 mm. and three 44,45 and 47 mm. re- 



