Books by P. H. Timberlake
Review of North American Exoma
Review of North American Exomalopsis (Hymenoptera, Anthophoridae)
Richard Nixon, his relatives a
Richard Nixon, his relatives and inauguration
Descriptions of new species of
Descriptions of new species of Perdita (Hymenoptera, Apoidea) in the collection of the California Academy of Sciences
The North American species of
The North American species of Heterosarus Robertson (Hymenoptera, Apoidea)
Revision of the genus Pseudopa
Revision of the genus Pseudopanurgus of North America (Hymenoptera, Apoidea)
Supplementary studies on the s
Supplementary studies on the systematics of the genus Perdita (Hymenoptera, Andrenidae)
A contribution to the systemat
A contribution to the systematics of North America species of Synhalonia (Hymenoptera, Apoidea)
A contribution to the systemat
A contribution to the systematics of North American species of Synhalonia (Hymenoptera, Apoidea)
A revisional study of the bees
A revisional study of the bees of the genus Perdita F. Smith
A revisional study of the bees
A revisional study of the bees of the genus Perdita F. Smith, with special reference to the fauna of the Pacific Coast (Hymenoptera, Apoidea)
Bees of the genus Colletes chi
Bees of the genus Colletes chiefly from Colorado
The Coccinellidae or ladybeetl
The Coccinellidae or ladybeetles of the Koebele collection ..
Encyrtidae of the Marquesas an
Encyrtidae of the Marquesas and Society Islands; Hymenoptera, Chalcidoidea
Three new species of the hymen
Three new species of the hymenopterous family Encyrtidae from New South Wales
Notes on some anthidiine bees
Notes on some anthidiine bees of Montana and California
New genera and species of Ency
New genera and species of Encyrtinae from California parasitic in mealybugs (Hypmenoptera)
Revision of the parasitic hymenopterous insects of the genus Aphycus Mayr
v. Experimental parasitism
v. Experimental parasitism