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THEORY OF EVOLUTION 



FIG. 54. Group II. (See text.) 



eye color belongs in Group II; it resembles 

 the color of the eye of the wild fly but is darker 

 and more translucent. 



In the second figure (b) the wing is again 

 long and narrow and sometimes bent back on 

 itself, as shown here. In several respects the 

 wing resembles strap (d) but seems to be due 



