TABLE OF CONTENTS. XIX 



Page. 



Genus 2 . Panyptila Cabanis 690 



Key to the Species of Panyptila 691 



2. Panyptila cayanensis (Gmelin) 691 



3. Panyjjtila sancti-hieronymi Salvin 692 



Genus 3. Tachornis Gosse 693 



Key to the Subsjiecies of Tachornis phcenicobia 693 



4. Tachornis phcenicobia jihoenicobia Gosse 694 



5. Tachornis i-)hoenicobia yradii (Lembeye) 695 



Genus 4. Streptoprocne Oberholser 696 



Key to the Species and Subspecies of Streptoprocne 697 



6. Streptoprocne zonaris albicincta (Cabanis) 697 



7. Streptoprocne zonaris mexicana Ridgway 700 



8. Streptoprocne zonaris pallidifrons (Hartert) 701 



9. Streptoprocne semicollaris (Saussure) 702 



Genus 5. Nephoecetes Baird 703 



Key to the Subspecies of Nephoecetes niger 704 



10. Nephoecetes niger niger (Gmelin) 704 



11. Nephoecetes niger jamaicensis Ridgway 705 



12. Nephoecetes niger borealis (Kennerly) 707 



13. Nephoecetes niger costaricensis Ridgway 710 



Genus 6. Cypseloides Streubel 710 



Key to the Species and Subspecies of Cypseloides 711 



14. Cypseloides brunneitorques brunneitorques (Lafresnaye) 712 



15. Cypseloides brunneitorques griseifrons Nelson 714 



16. Cypseloides cherriei Ridgway 714 



Genus 7. Choetura Stephens 714 



Key to the Species and Subspecies of Chaetura 715 



17. Chfetura pelagica (Linna?us) 717 



18. Chaetura richmondi Ridgway 719 



19. Chaetura gaumeri Lawrence 721 



20. Chaetura vauxii (Townsend) 722 



21. Chfetura acuta (Gmelin) 724 



22. Chaetura cinereiventris fumosa (Salvin) 725 



23. Chaetura cinereiventris lawrencei Ridgway 727 



24. Chaetura cinereiventris phaeopygos Hcllmayr 727 



25. Cha?tura brachyura (Jardine) 728 



Suborder IIeterodactyl.e 729 



Family Trogonid^ 731 



Key to the Genera of Trogonidae 732 



Genus 1. Pharomachrus De la Llave 733 



Key to the Species and Subspecies of Pharomachrus 734 



1. Pharomachrus mocinno raocinno De la Llave 736 



2. Pharomachrus mocinno costaricensis (Cabanis) 739 



Genus 2. Leptuas Cabanis and Heine 740 



3. Leptuas neoxenus (Gould) 741 



Genus 3. Curucujus Bonaparte 742 



Key to the Species and Subspecies of Curucujus 743 



4. Curucujus massena (Gould) 744 



5. Curucujus melanurus macrourus (Gould) 747 



6. Curucujus clathratus (Salvin) 749 



Genus 4. Trogon Brisson 750 



Key to the Species and Subspecies of Trogon 751 



7. Trogon bairdii Lawrence : 752 



8. Trogon strigilatus chionurus (Sclater and Salvin) 754 



