SUB-TRIBE I.—NOCTURNAL FISSIROSTRES (FISSIROSTRES NOCTURNI).
FAMILY I.—THE GOATSUCKERS (CAPRIMULGIDÆ).
| Sub-Family | 1.—The Oil Birds (Steatorninæ). |
| " " | 2.—The Goatsuckers Proper (Caprimulginæ). |
| " " | 3.—The Podagers (Podagerinæ) |
SUB-TRIBE II.—DIURNAL FISSIROSTRES (FISSIROSTRES DIURNI).
FAMILY II.—THE SWALLOWS (HIRUNDINIDÆ).
| Sub-Family | 1.—The Swifts (Cypselinæ). |
| " " | 2.—The Swallows Proper (Hirundininæ). |
FAMILY III.—THE ROLLERS (CORACIADÆ).
| Sub-Family | 1.—The Rollers (Coracianæ). |
| " " | 2.—The Todies (Todinæ). |
| " " | 3.—The Broad-throats (Eurylaiminæ). |
| " " | 4.—The Mot-mots (Momotinæ). |
FAMILY IV.—THE TROGONS (TROGONIDÆ).
FAMILY V.—THE KINGFISHERS (ALCEDINIDÆ).