EXPLANATION TO PLATE II. 



Fig. 1. Bonasa umbellus, Linnaeus. Ruffed Grouse. 



Pig. 2. Bonasa umbellus togata, Linnaeus. Canadian Ruffed Grouse. 



Fig. 3. Bonasa umbellus umbelloides, Douglas. Gray Ruffed Grouse. 



Fig. 4. Bonasa umbellus sabini, Douglas. Oregon Ruffed Grouse. 



Figs. 5, 6, 7, 8, 9^ 10. Lagopus lagopus, Linnaeus. Willow Ptarmigan. 



Figs. 11, 12, 13, 14, 15. Lagopus rupestris, Gmelin. Rock Ptarmigan. 



Figs. 16, 17. Lagopus leucurus, Swainson. White-tailed Ptarmigan. 



Figs. 18, 19, 20. Tympanuchus americanus, Reichenbach. Prairie Hen. 



Fig. 21. Zenaida zenaida, Bonaparte. Zenaida Dove. 



Fig. 22. Engyptila albifrons, Bonaparte. White-fronted Dove. 



Fig. 23. Melopelia leucoptera, Linnaeus. White-winged Dove. 



Fig. 24. Columbigallina passerina pallescens, Baird. Mexican Ground Dove. 



Fig. 25. Scardafella inca, Lesson. Inca Dove. 



Fig. 26. Geotrygon montana, Linnaeus. Ruddy Quail Dove. 



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