. The birds of eastern North America known to occur east of the nineteenth meridian .. . -^^ Family MICROPODID/E. Swifts. See pagt^ 190. b First ])rimary, about half as long as third;feet, zygodactjle (toes, two in front, two ))e-Uiud) ; outer tail featliers, very mucli shorterthan middle feathers. Family CUCULID/E. 320 See page 188. KEY TO FAMILIES. LAND BIRDS. 145 Feet, syndactyle; toes, four, the middle und outer cues joined, beititr fastened to,i;eilier formore than halt tlieir leugtli.

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