Bull 30, Biological Survey, U. S. Dept of Agriculture. 



Plate II. 



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Fig. 2. 



Fig. 4. 



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xi 



Fig. 6. 



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Fig-. 7. 



p-ig. s. 



Seeds of Common Weeds Eaten by the Linnet. 



Fig. ].— Naiiii thistle \ <\ 



Fig. 9. 



