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 higli-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 : — Turd idee (2 genera) ; Troglodytidae (1 gen.) ; 
Yireonidae (1 gen.) ; Corvidae (2 gen.) ; Ampelidae (1 gen.) ; 
Tanagridae (1 gen.) ; Fringillidae (2 gen.) ; Icteridae (1 gen.) ; 
Formicariidae (2 gen.) ; Tyrannidse (2 gen.) ; Cotingidse (1 gen.) ; 
Momotidae (1 gen.) ; Trogonidae (1 gen.); Trochilidae (14 gen.); 
Conuridae (1 gen.) ; Cracidae (2 gen.) ; Strigidse (1 gen.) ; in all 
37 genera of land-birds. The Neotropical families that do not 
extend into this sub-region are, Pteroptochidae ; the sub-family 
Furnariinm of the Dendrocolaptidae ; the sub-family Conopha- 
gince of the Tyrannidae; the sub-family Bupicolince of the 
Cotingidse ; Phytotomidae ; Todidae ; Opisthocomidse ; Chioni- 
didae ; Thinocoridae ; Cariamidae ; Psophiidae ; Eurypygidae ; 
Palamedeidse ; and Struthionidae. On the other hand Paridae, 
Certhiidae, Ampelidae, and Phasianidae, 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, Mniotiltidse, Yireonidae, 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 Y eragua,— countries which possess a rich 
and remarkable fauna. Here only are found an umbrella bird, 
( Cephalopterus glabricollis ) ; a bell bird ( Chasmorhynckns tricar- 
unculatus ) ; and species of Dacnis (Ceroebidae), Buthraupis, 
Eucometis , Tachyphonus (Tanagridae), Xiphorhynckus (Dendro- 
colaptidae) ; Hypocnemis (Formicariidae) ; Euscarthmus (Tyran- 
nidae) ; Attila (Cotingidae) ; Piprites (Pipridae) ; Capito , Tetra- 
gonops (Megalaemidse) ; Selenidera (Rhamphastidae) ; Neomorphus 
