EXPLANATION TO PLATE in. 



Figs. 1,2,3. Chordeiles virginianus, Gmelin. Nighthawk. 



Fig. 4. Chordeiles virginianus henryi, Cassin. Western Nighthawk. 



Figs. 5, 6. Chordeiles virginianus chapmani, Sennett. Florida Nighthawk 



Figs. 7. 8, it, 10. Chordeiles acutipennis texensis, Lawrence. Texan Nighthawk. 



Figs. 11, 12. 13. Pica pica hudsonica, Sabine. American Magpie. 



Fig. 14. Pica nuttalli, Audubon. Yellow-billed Magpie. 



Figs. 15, lfi, 17. Xanthoura luxuosa, Lesson. Green Jay. 



Figs. 18. 19. Perisoreus canadensis. Linnaeus. Canada Jay. 



Fig. 20. Perisoreus canadensis nigricapillus, Ridgway. Labrador Jay. 



Fig. 21. Perisoreus obscurus, Ridgway. Oregon Jay. 



Figs. 22. 23. Nucifraga columbiana, Wilson. Clarke's Nutcracker. 



Figs. 24, 25. Cyanocephalus cyanocephalus. Wied. Pinon Jay. 



