- Directions For Collecting And Preparing Fossils
- Zoology of Colorado
- Monograph of the Bombycine Moths of North America, Including Their Transformations and Origin of the Larval Markings and Armature: PT. 2
- The Bees Of The Genus Perdita F. Smith
- Monograph of the Bombycine Moths of North America, Including Their Transformations and Origin of the Larval Markings and Armature; Volume PT. 2