List of Text Illustrations 



Pack 



March first. Spring Peepers begin calling when 

 the pussy willows are gray . . . .140 



Late March. Spring Peepers are singing both day 

 and night when the pussy willows are in blossom 141 



The middle of April, When pussy willow seed 

 pods are ripening, Spring Peepers are calling only 

 during the late afternoon and night . . . 142 



Early May. The chorus of Spring Peepers closes 

 as the pussy willow is scattering feathery seeds 144 



The chorus of Spring Peepers begins when the blue 

 violets of the marsh are first opening, and closes 

 when these violets are struggling for light among 

 rank growths of fern and hellebore . . -145 



Pickering's Hyla is still calling in the woods, when 

 the witchhazel's yellow flowers appear . . 147 



The maroon hoods of the skunk-cabbage are pic- 

 turesque among moss and dead leaves at the 

 time when the eggs of the Leopard Frog are 



laid 175 



Fig. 204. Series of diagrams to show cleavage of the frog's 

 egg. The second very nearly corresponds to 

 Fig. 202. The third represents Fig. 203. The 

 last is a stage just preceding that of Fig. 205 

 in which the cells are too small to be seen. 

 (After Ecker) 177 



A narrow escape from the jaws of the water-tiger 182 



What are apparently green stems come to life and 

 send out powerful arms to capture the tadpoles 182 



The back-swimmer is a powerful enemy of the young 

 tadpoles 183 



Late March. The Leopard Frogs are croaking in 

 the pond when the blue-birds are deciding on 

 a home 184 



July. The Leopard Frogs eat the young grass- 

 hoppers that are so thick in the grass . .185 



The Pickerel Frogs are croaking when the blue 

 flags are in bloom 189 



The Green Frog comes from his winter sleep soon 

 after the redwings appear in the marshes . 200 



JCVl 



