25;
antennae, 25;
the ruling sex among, 140, 141.

Interpretation, 186-90.

Ironweed, 116.

James, William, 22.

Jay, blue, notes, 87.

Joe-Pye-weed, 116.

Junco, young, 19, 20;
nesting, 81;
abundance, 82.

Kepler, Johann, 169.

Killdeer, 130, 131.

Kingbird, flight, 37;
and bees, 156.

Leaves, autumn, 1-3.

Lemmings, 152, 153.

Life, origin of, 194, 195.

Life, human, analogies, 25-27.

Lightning-bugs. _See_ Fireflies.

Lowell, James Russell, quoted, 5.

Lubbock, Sir John, quoted, 156.

McCarthy, Denis Aloysius, quoted, 157.

Maeterlinck, Maurice, quoted, 23, 162;
on the bee, 156-63.

Man, and Darwinism, 174;
a part of nature, 184-86;
interpretation of nature and of himself, 186-90;
mystery of his evolution, 216.

Maple, sugar, susceptibility to atmospheric changes, 72, 73.

Maples, autumn color, 3.

Marcus Aurelius, quoted, 185.

Meadowlark, song flight, 37.

Measuring-worm, 91, 92.

Mice, wild, 16;
barking trees, 27, 28.

Microphone, 170, 171.

Microseisms, 170.

Mind, community of, 152-55.

Mockingbird, 68.

Moose, 200.

Mosquitoes, 210.

Moth, luna, 97.

Mouse, jumping, 166, 167.

Mouse, white-footed, 166.

Mullets, 154.

Natural history about home, 39, 40.

Nature, her methods unlike ours, 179-81, 199;
interpreting, 186-90;
lavishness and parsimony, 195, 196, 209;
puzzling and contradictory, 201, 202;
all-seeing, 212-14;
her movements circular, 214-16.

Nighthawk, 104.

Nonpareil, _or_ painted bunting, 114.

North Carolina, a countryman of, 121.

Northern Hemisphere, 171, 172.

Oak, autumn color, 3.

Odd and even numbers, 163-65.

Oriole, Baltimore, 30, 56;
nest, 48-52, 64.

Oriole, Bullock's, nest, 52.

Oriole, orchard, nest, 52.

Osborn, Henry Fairfield, on the origin of life, 194, 195.

Ostrich, 200.

Owl, screech, 45-47.

Pacific Ocean, 127.

Pain, 209.

Pear-trees, autumn color, 1.

Pelican, California brown, 131, 132.

Pennsylvania, motor trip through, 109-13.

Pewee, wood, nest, 52, 64;
its plaint, 87.

Phoebe, flight, 37;
nest, 52-54, 56, 59, 60, 64, 79, 80.

Pigeon, wild, 103, 104.

Pine Knot, Va., visit to, 101-08.

Pipit, American, 129;
nest, 129, 130.

Pittsburgh, 111.

Plover, killdeer, 130