P. H. Timberlake

Revision of the parasitic hymenopterous insects of the genus Aphycus Mayr

1916

Review of North American Exomalopsis (Hymenoptera, Anthophoridae)

1980

Richard Nixon, his relatives and inauguration

1978

Descriptions of new species of Perdita (Hymenoptera, Apoidea) in the collection of the California Academy of Sciences

1977

The North American species of Heterosarus Robertson (Hymenoptera, Apoidea)

1975

Revision of the genus Pseudopanurgus of North America (Hymenoptera, Apoidea)

1973

Supplementary studies on the systematics of the genus Perdita (Hymenoptera, Andrenidae)

1971

A contribution to the systematics of North American species of Synhalonia (Hymenoptera, Apoidea)

1969

A contribution to the systematics of North America species of Synhalonia (Hymenoptera, Apoidea)

1969

A revisional study of the bees of the genus Perdita F. Smith

1954

A revisional study of the bees of the genus Perdita F. Smith, with special reference to the fauna of the Pacific Coast (Hymenoptera, Apoidea)

1954

Bees of the genus Colletes chiefly from Colorado

1943

The Coccinellidae or ladybeetles of the Koebele collection ..

1943

Encyrtidae of the Marquesas and Society Islands; Hymenoptera, Chalcidoidea

1941

Three new species of the hymenopterous family Encyrtidae from New South Wales

1929

New genera and species of Encyrtinae from California parasitic in mealybugs (Hypmenoptera)

1918

v. Experimental parasitism

1912

Notes on some anthidiine bees of Montana and California

Miscellaneous new chalcid-flies of the hymenopterous family encyrtidae