Hinckley.] 
104 
[November 17, 
Mr. S. W. Garman in behalf of the author read the following 
paper : 
NOTES ON EGGS AND TADPOLES OF HYLA VERSICOLOR. 
BY MAKY H. HINCKLEY. 
The following observations were made in Milton, Massachu- 
setts, during the spring and summer of 1880. 
May 4th. For the first time this season the notes of Hyla ver- 
sicolor were heard. 
May 10th. Mercury 85°. In the water at Forbes’ Pond found 
a pair of this species in the act of egg laying. The eggs were 
attached singly and in small groups, along the grasses resting on 
the water’s surface. When first laid, the eggs were nearly all of a 
drab color in the upper surface. After a few hours on the water 
this color becomes lighter. The under surface is white. The ex- 
tent of this color varies ; in a few cases, only a spot of drab is 
seen on an otherwise white egg. 
May 11th. Tadpoles partially unfolded; a few have already 
escaped from the gelatinous envelope. 
May 12th. Tadpoles all hatched and clinging by means of two 
prominent holders to the grasses nearest at hand. They average 
about one-quarter of an inch in length. The head and body are 
cream-colored dotted with olive ; the abdomen pale yellow. 
May 13th. External gills branching out. Tadpoles occasion- 
ally moving about. 
May 14th. Abdomen growing round. External gills devel- 
oped. 
May 15th. Gills on right side disappearing. Holders gradu- 
ally losing prominence. 
May 16th. Gills on right side resorbed. 
May 17th. Gills disappearing on left side. Tadpoles growing 
deep olive green. Fine dotting of gold color appearing on both 
upper and under surfaces. Abdomen shows iridescent sheen. 
Down each side from before the eye to the root of the tail is a 
line of gold color. 
May 18th. Gills resorbed. Tadpoles lively; movements very 
