296 



INEZ WHIPPLE WILDER. 



a .a 



GRAPH III., showing the growth in length during the aquatic larval period 

 (lines a-/), metamorphosis (line/), and the first two years of adult life (lines /-/); 

 also, for comparison with these, the average length (line j) and the maximum 

 length (line k) of ten miscellaneous adults. Based upon the statistics given in the 

 first column of Table II. 



The time ratios are indicated by measurements horizontally. The vertical 

 lines show, natural size, the average lengths of specimens as follows: 



Aquatic larval period: 



a, collected in September and October. 



b, collected in November and December. 



c, collected in January and February. 



d, collected in March and April. 



e, collected in May. 

 Metamorphosis: 



/, collected in June and July. 

 Adult period: 



g, collected in the September following metamorphosis. 

 h, collected in May nearly one year after metamorphosis. 

 i, collected in June and July two years after metamorphosis. 

 j, average cf 10 miscellaneous adults. 

 k, maximum of 10 miscellaneous adults. 



