334 INEZ WHIPPLE WILDER. 



PLATE II. 



FIGS. 7 and 8. Lateral and ventral views of terrestrial larval stage D, age 

 days. 



FIG. 9. Lateral view of terrestrial larval stage F, a small specimen which has 

 attained the proportions of the aquatic larvae, age 15 Hi days. Line lod and i2c 

 show the location of the sections shown in the text figures correspondingly numbered. 



FIGS. 10 and 11. Lateral and ventral views of an aquatic larva collected in 

 October. Line ?b indicates the location of the section shown in the text figure 

 correspondingly numbered. The dotted lines show the levels used in arbitrarily 

 dividing the body into head, trunk, and tail regions for measurements (cf. Tables 

 I., and II., and Graphs I., II., III., and IV.). 



