LIST OF ILLUSTRATIONS. 



PLATES. 



Page. 



Plate I. Bobwhite _ Frontispiece. 



II. Gambel quail 56 



TEXT FIGUEES. 



Fig. 1. Witch grass seed .__ _.. . 31 



2. Crab grass seed ._ ..._ 32 



3. Knot grass seed-.... .-_ 33 



4. Mayweed seed ^ _ r)3 



5. Alfilaria seed S3 



6. Black mustard seed ..- 53 



7. Chick weed seed _ _ '54 



8. Geranium seed- ._ 54 



9. Sorrel seed , 54 



10. Chess seed --.. 55 



6 



