United States. Bureau of Entomology and Plant Quarantine. Division of Forest Insect Investigations

• A ponderosa pine tree classification for use in determining susceptibility to bark-beetle attack
• Brief history of the Division of Forest Insect Investigations and its accomplishments
• Note on small red and green galls or swellings on upper surface of silver maple leaves
• The bagworm
• Control of Dutch elm disease and elm phloem necrosis