CHAP, xiv.] THE NEOTROPICAL REGION. 53 



be estimated from the fact, that Messrs. Salvin and Sclater have 

 catalogued more than 600 species from the comparatively small 

 territory of Guatemala, or the portion of Central America between 

 Mexico and Honduras. The great mass of the birds of this 

 sub-region are of Neotropical families and genera, but these are 

 intermingled with a number of migrants from temperate North 

 America, which pass the winter here ; with some northern forms 

 on the high-lands ; and with a considerable number of peculiar 

 genera, mostly of Neotropical affinities. 



The genera of birds peculiar to this sub-region belong to the 

 following families : Turdidse (2 genera) ; Troglodytidae (1 gen.) ; 

 Vireonidae (1 gen.) ; Corvidae (2 gen.) ; Ampelidae (1 gen.) ; 

 Tanagridae (1 gen.) ; Fringillidse (2 gen.) ; Icteridss (1 gen.) ; 

 Formicariidae (2 gen.) ; Tyrannidae (2 gen.) ; Cotingidas (1 gen.) ; 

 Momotidae (1 gen.) ; Trogonidse (1 gen.); Trochilidae (14 gen.); 

 Conuridae (1 gen.) ; Cracidae (2 gen.) ; Strigidae (1 gen.) ; in all 

 3,7* genera of land-birds. The Neotropical families that do not 

 extend into this sub-region are, Pteroptochidse ; the sub-family 

 Furnariince of the Dendrocolaptidae ; the sub-family ConopJia- 

 gince of the Tyrannidae; the sub-family Rupicolince of the 

 Cotingidae ; Phytotomidae ; Todidae ; Opisthocomidae ; Chioni- 

 didae ; Thinocoridae ; Cariamidae ; Psophiidae ; Eurypygidoe ; 

 Palamedeidae ; and Struthionidae.' On the other hand Paridae, 

 Certhiidae, Ampelidae, and Phasianidae, 2 are northern families repre- 

 sented here, but which do not reach South America ; and there 

 are also several northern genera and species, of Turdidae, Troglo- 

 dytidae, Mniotiltidae, Vireonidae, Fringillidae, Corvidae, Tetra- 

 onidae, and Strigidae, which are similarly restricted. Some of 

 the most remarkable of the Neotropical genera only extend as 

 far as Costa Rica and Veragua, countries which possess a rich 

 and remarkable fauna. Here only are found an umbrella bird, 

 (Cephalopterus glabricollis) ; a bell bird (CliasmorJiynchus tricar- 

 unculatus) ; and species f of Dacnis (Qe^pebidae); Buthraupis, 

 Eucometis, Tachyphonus (Tanagridae); .Xiphorhynchus (Dendro- 

 colaptidae) ; Hypocnemis (Formicariidae) ; Euscarthmus (Tyran- 

 nidae) ; Attila (Cotingidae) ; Piprites (Pipridae) ; Capita, Tetra- 

 gonops (Megalaemidae) ; Selenidera (Ehamphastidae) ; Neomorphus 



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