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



Plate II. 



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H 



Fig. 1. 



M 



Fig. 2. 



Fig. 4. 



Fig. 5. 



Fig-. 8. 



Fig. 9. 



Seeds of Common Weeds Eaten by the Linnet. 



Fig. 1.— Napa thistle '{Centaurea melitensu). Fig. 2.— Black mustard ( Br assica nigra). 

 Fig. 3.— Alfilaria {Erodium cieutarium). Fig. 4.— Knotweed {Polygonum aviculare). 

 Fig. 5.— Tarweed {Madia sat iv a). Fig. 6.— Burweed {AmsincMatesselaia). Fig. 7.— 

 Turkey mullen (Ercmocarpus setigenm). Fig. 8. — Milk thistle {Mariana mariniana). 

 Fig. 9.— Poison oak {Rhus diversiloba) . 



