Sub-family I. FURNARIINÆ (8 genera, 30 species). Ranges over all South America, 4 genera and 18 species being restricted to the temperate sub-region; one species is found in the Falkland Islands.
Sub-family II. SCLERURINÆ (1 genus, 6 species). Brazil to Guiana, Columbia, and north to Mexico.
Sub-family III. SYNALLAXINÆ (12 genera, 78 species). Ranges from Patagonia to Mexico; 7 genera and 28 species are confined { 296}to the temperate sub-region; species occur in the islands of Mas-a-fuera, Trinidad, and Tobago.
Sub-family IV. PHILYDORINÆ (6 genera, 35 species). Confined to Tropical America from Brazil to Mexico; 4 genera and 8 species occur in Tropical North America.
Sub-family V. DENDROCOLAPTINÆ (14 genera, 59 species). Ranges from Chili and La Plata to Mexico; only 3 species occur in the South Temperate sub-region, while 9 of the genera extend into Tropical North America. Two of the continental species occur in the island of Tobago, which, together with Trinidad, forms part of the South American rather than of the true Antillean sub-region.
FAMILY 45.--FORMICARIIDÆ. (32 Genera, 211 Species.)
GENERAL DISTRIBUTION. __________________________________/\__________________________________ / \ NEOTROPICAL| NEARCTIC |PALÆARCTIC | ETHIOPIAN | ORIENTAL | AUSTRALIAN SUB-REGIONS|SUB-REGIONS|SUB-REGIONS|SUB-REGIONS|SUB-REGIONS|SUB-REGIONS. -----------+-----------+-----------+-----------+-----------+------------ | | | | | -- 2. 3 -- |-- -- -- --|-- -- -- --|-- -- -- --|-- -- -- --|-- -- -- -- | | | | |
The Formicariidæ, comprising the Bush-Shrikes and Ant-thrushes, form one of the most exclusively Neotropical families; and the numerous species are rigidly confined to the warm and wooded districts, only a single species extending to La Plata, and none to the Antilles or to the Nearctic region. Less than 30 species are found north of Panama. Messrs. Sclater and Salvin divide the group into three sub-families, whose distribution may be conveniently treated, as in the Dendrocolaptidæ, without enumerating the genera.
Sub-family I. THAMNOPHILINÆ.--(10 genera, 70 species.) One species of _Thamnophilus_ inhabits La Plata; only 3 genera and 12 species are found north of Panama, the species of this sub-family being especially abundant in the Equatorial forest districts.