110 



THE WORLD OF LIFE 



shown by the upper somewhat irregularly curved line of 

 dots. This is seen to vary from 4^ inches to a little less 



Inches 



5. 1 2 3 4 5 $ 7 & 9 10 2J l^ J3 14 J5 16 17 18 J9 2 



4. 



0. 



nody. 



Tars 



O. 



1 2 3 4 5 6 7 8 9 1O 11 12 15 14 15 16 17 1Q 29 2O 

 Rice-bird(DohchonyX'Oryz2Vorusj 2O Males. 



FIG. 10. DIAGRAM OF VARIATION. 



than 5 inches. The next lower line shows the length of the 

 wing of each specimen, and we at once see the want of 



