PREFACE. 



More than one-third of the present volume (pp. 1-309, inclusive) 

 was printed in 1911, having been intended for Part V; but, as stated 

 in the Preface to that volume, could not be included therein without 

 unduly increasing the bulk. The matter has, however, been revised, 

 and to a large extent reset, in order to bring the subject up to date. 

 A similar fate has befallen two large groups intended for the present 

 volume, namely, the Coccygiformes (Cuckoo-like Birds) and Psitta- 

 cifomies (Parrots) ; the former having been left out at the last 

 moment (for the same reason as were the Woodpeckers from Part V), 

 after having been entirely put in type,^ the latter in large part com- 

 pleted in manuscript. 



The Families of birds included in the present and preceding vol- 

 umes are as follows: 



Part I, issued October 24, 1901, included the FringilUdse (Finches) 

 alone. 



Part II, issued October 16, 1902, included the Tanagridae (Tanagers) , 

 Icteridse (Treupials), Coerebidae (Honey Creepers), and Mniotiltidae 

 (Wood Warblers). 



Part III, issued December 31, 1904, included the Motacillidse (Wag- 

 tails and Pipits), Hirundinidse (Swallows), AmpeUdae (Waxwings), 

 Ptilogonatidse (Silky Flycatchers), Dulidse (Palm Chats), Vireonidae 

 (Vireos), Laniidse (Shrikes), Corvidae (Crows and Jays), Paridte (Tit- 

 mice), Sittidae (Nuthatches), Certhiidae (Creepers), Troglodytidag 

 (Wrens), CinclidaB (Dippers), Chamaeidae (Wren-Tits), and Sylviidae 

 (Warblers). 



Part IV, issued July 1, 1907, contained the remaining groups of 

 Oscines, namely, the Turdidae (Thrushes), ZeledoniidjB (Wren- 

 Thrushes), Mimidae (Mockingbirds), Sturnidae (Starhngs), Ploceidse 

 (Weaverbirds), and Alaudidae (Larks), together with the Haploo- 

 phone or Oligomyodian Mesomyodi, comprising Oxyruncidae (Sharp- 

 biUs), Tyrannidse (Tyrant Flycatchers), Pipridas (Manakins), and 

 Cotingidfe (Chatterers). 



Part V, issued November 29, 1911, includes the Tracheophone 

 Mesomyodi, represented by the Pteroptochidae (Tapaculos), Formi- 

 cariidaG (An thirds), Fumariidae (Ovenbirds), and Dondrocolaptidae 



I This matter, comprising 101 printed pages, wiD appear in Part VII. 



