XVIII TABLE OF CONTENTS. 



Page. 



< ieinis 5. Idiotric'cus Kidgway "96 



9. Idiotriccus zeledoni ( Lawrence) 797 



Cienus 6. Klainopsis Ridgway 799 



10. Elaiiioi)sis gaimardii mat'ilvainii ( Lawrence ) 800 



Genus 7. Attila Lesson 801 



Key to the Species and Subspecies of Attila 802 



- 12. Attila teplirocephalus Ridgway 804 



13. Attila citreopygus citreopygus (Bonaparte) 805 



14. Attila citreopygus salvini Ridgway 807 



15. Attila citreopygus cinnamomeus ( Lawrence) 809 



16. Attila citreopygus mexicanus ( Nelson ) 810 



17. Attila citreopygus luteolus Ridgway 810 



18. Attila citreopygus gaumeri (Salvin and (lodnian) 811 



19. Attila citreopygus cozumeLe (Ridgway ) 812 



Genus 8. Hylonax Ridgway 813 



20. Hylonax validus (Cabanis) 814 



Genus 9. Sirystes Cabanis and Heine 815 



Key to the Species and Subspecies of Sirystes 817 



21. Sirystes albogriseus (Lawrence) 817 



Genus 10. Lipaugus Boie 818 



Key to the Species and Subspecies of Lipaugus 819 



22. Lipaugus holerythrus holerythrus Sclater and Salvin 820 



Genus 11. Lathria Swainson 821 



Key to the Subspecies of Lathria unirufa. 822 



23. Lathria unirufa unirufa (Sclater) ' 823 



24. Latliria unirufa clara Riilgway 824 



( ienus 12. Pachyrhamphus Gray 825 



Key to the Species and Subspecies of Paciiyrhamphns 826 



25. Pachyrhamphus polychropterus cinereiventris ( Sclater) 829 



26. Pachyrhamphus polychropterus similis (Cherrie) 832 



27. Pachyrhamphus dorsalis Sclater _ 832 



28. Pachyrhamphus major major (Cabanis) 833 



29. Pachyrhamphus major uropygiahs Nelson 836 



30. Pachyrhamphus major itzensis Nelson 836 



31. Pachyrliamphus albo-griseus albo-griseus Sclater 836 



32. Pachyrhamphus cinereus ( Boddaert) 838 



33. Pachyrhamphus cinnamomeus Lawrence. 840 



34. Pachyrhamphus ornatus Cherrie 842 



35. Pachyrhamphus versicolor ( Hartlaub) 843 



Genus 13. Platypsaris Sclater 846 



Key to the Species and Subspecies of Platypsaris 847 



36. Platypsaris niger (Gnielin) 849 



37. Platypsaris aglaia? aglai;e (Lafresnaye) 850 



38. Platypsaris aglaire sumichrasti Nelson 852 



39. Platypsaris aglaia? hypophanis Ridgway 854 



40. Platypsaris aglaite latirostris ( Bonaparte) 855 



41 . Platypsaris aglaite albi ventris ( Lawrence) 856 



42. Platypsaris aglaia? insularis (Ridgway) 857 



43. Platypsaris aglaise yucatanensis Ridgway 858 



44. Platypsaris homochrous (Sclater) 859 



Genus 14. Erator Kaup 860 



Key to the Species of Erator 862 



45. Erator all)itorques (Du Bus) 863 



