Ecology

Out of Doors—California and Oregon

Food Habits of the Thrushes of the United States

Earthworms and Their Allies

An Account of the Insects Noxious to Agriculture and Plants in New Zealand

Fishes of Chautauqua, Cowley and Elk Counties, Kansas

Notes of a naturalist in South America

Forest Trees of Illinois: How to Know Them

Trees: A Woodland Notebook

Love's Meinie: Three Lectures on Greek and English Birds

The Structure and Habits of Spiders

More Hunting Wasps

The Legend of Kupirri, or, The Red Kangaroo

Running Free

Adventures of a Young Naturalist

Wilderness Babies

Ecological Observations on the Woodrat, Neotoma floridana

The Nakimu Caves, Glacier Dominion Park

Pere Marquette State Park

Flowers of Mountain and Plain

The Young Collector's Handbook of Ants, Bees, Dragon-flies, Earwigs, Crickets, and Flies