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1929
Descriptions and Records of Bees — CXVIII, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees — CXX, T. D. A. Cockerell; Annals and Magazine of Natural History
New Bees from the Mesa Verde National Park, Colorado, T. D. A. Cockerell; Journal of the New York Entomological Society
Red-Haired Bees from China, T. D. A. Cockerell; The Entomologist
Some Bees of the Group Trachandrena Robertson (Hymenoptera: Andrenidæ), T. D. A. Cockerell; Annals of the Entomological Society of America
Some Californian Parasitic Bees, T. D. A. Cockerell; The Pan-Pacific Entomologist
Some Results of a Journey to Kaieteur Falls, British Guiana, T. D. A. Cockerell; Annals and Magazine of Natural History
Two New Bees of the Genus Triepeolus, T. D. A. Cockerell and Philip H. Timberlake; The Pan-Pacific Entomologist
Bulletin of the Raffles Museum Singapore, Straits Settlements No. 2, C. Boden Cross, F. N. Chasen, Cedric Dover, N. Smedley, K. G. Blair, G. E. Bryant, V. Laboissiere, Fred Ohaus, L. Chopard, J. C. Moulton, V. Lallemand, F. Kopstein, Eduard Reimoser, and C. Fr. Roewer; Bulletin of the Raffles Museum
Habits of Perdita Zebrata with Description of Larva, Clarence P. Custer; The Canadian Entomologist
K Фаунистике Шмелей Ленингредской Губернии, C. Federolf; Русск. Энтом. Обоар.
New Records and Descriptions of Bees of the Genus Perdita (Hymenoptera), Philip H. Timberlake; Journal of the New York Entomological Society
Records of Western Species of Perdita with Descriptions of Two New Species (Hymenoptera), Philip H. Timberlake; The Pan-Pacific Entomologist
Матар'ялы да вывучэньня фауны Hymenoptera Беларусi. I. Psithyridae Менскай aкpyri, М. Дабратворскi and N. Dobrotworski; Мат. флёры i фауны т.
1928
Beitrag zur Kenntnis einiger Chalicodoma-Arten (Hym. Apid.), J. D. Alfken; Deutsch. Ent. Zeitschr.
Eine neue Anthidium-Art aus Agypten (Hym. Apid.), J. D. Alfken; Deutsch. Ent. Zeitschr.
Eine neue Kegelbiene aus Tunis., J. D. Alfken
II. Hymenoptera: Apidae, J. D. Alfken; Sonderabdruck aus Abh. Net. Ver. Bremen.
The Sphegidae of South Africa, George Arnold; Annals of the Transvaal Museum
Descriptions D'especes Nouvelles D'hymenopteres Melliferes de Genre Heriades, M. Raymond Benoist; Bull. Mus. Hist. Nat. Paris
Hymenopteres Melliferes Nouveaux du Maroc (Diagnoses preliminaires), R. Benoist; Bulletin de la Société des Sciences Naturelles du Maroc
Un Heriades Nouveau D'asie Mineure, R. Benoist; Ann. Soc. Entomol. France
Description D'une Nouvelle Osme D'algerie, Raymond Benoist; Ann. Soc. Entomol. France
Hymenopteres Melliferes nouveaux pour la faune francaise, Raymond Benoist; Bulletin de la Société Entomologique de France
Notes diverses sur les Hymenopteres Melliferes, Raymond Benoist; Bulletin de la Société Entomologique de France
A Study of Certain Types of Diplopterous Wasps in the Collection of the British Museum, Joseph Bequaert; Annals and Magazine of Natural History
Microtrimeria Cockerelli, a New Genus and Species of South American Masarids (Hymenoptera), Joseph Bequaert; Psyche
The Diplopterous Wasps of Fabricius, in the Banksian Collection at the British Museum, Joseph Bequaert; Bulletin of the Brooklyn Entomological Society
2. Beitrag zur Kenntnis der äthiopischen Halictinae. (Hym. Apid.), Paul Blüthgen; Deutsch. Ent. Zeitschr.
4. Beitrag zur Kenntnis der äthiopischen Halictinae. (Hym. Apid.) (Nachtrag zum 2. Beitrag.), Paul Blüthgen; Deutsch. Ent. Zeitschr.
Beiträge zur Kenntnis der indo-malayischen Halictus- und Thrincostoma-Arten (Hym., Apidae, Halictini). 1. Nachtrag., Paul Blüthgen; Zoologische Jahrbücher. Abteilung für Systematik, Ökologie und Geographie der Tiere
A Revision of the New World Species of Trielis a Subgenus of Campsomeris (Hymenoptera: Scoliidae), James Chester Bradley; Transactions of the American Entomological Society
Family Names, James Chester Bradley; Science
Sobre el Nombre de Una Scolia Europea (Hym. Scol.), James Chester Bradley; EOS, Revista Española de Entomologia
The Species of Campsomeris (Hymenoptera-Scoliidae) of the Plumipes Group, Inhabiting the United States, the Greater Antilles, and the Bahama Islands, James Chester Bradley; Proceedings of the Academy of Natural Sciences of Philidelphia
A Synopsis of the Mutillidæ of the Belgian Congo, James Chester Bradley and J. Bequaert; Bulletin of the American Museum of Natural History
Notes on the Life-History and Habits of Melittobia Chalybii Ashmead. (Chalcidoidea: Elachertidae), E. R. Buckell; Pan-Pacific Entomologist
Embryogénie Tératologique Chez Les Phasmides, P. Cappe de Baillon; Bulletin Biologique de la France et de la Belgique
Seasonal Behavior of Alfalfa Flowers as Related to Seed Production, John W. Carlson; Journal of the American Society of Agronomy
A New Bee of the Genus Andrena Visiting Senecio, T. D. A. Cockerell; Psyche
Bees Collected by Nathan Banks in the Vicinity of the Panama Canal, T. D. A. Cockerell; Psyche
Bees Collected in Siberia in 1927, T. D. A. Cockerell; Annals and Magazine of Natural History
III. Bees Collected by Dr. W. M. Wheeler at Flowers of Triplaris, T. D. A. Cockerell; Psyche
Some Bees from Utah, T. D. A. Cockerell; Psyche
Supplementary Notes on Colorado Bees, With a List of All the Genera, Theodore D. A. Cockerell; University of Colorado Studies
The Types of Hymenoptera in the Academy of Natural Sciences of Philadelphia Other Than Those of Ezra T. Cresson, Ezra Townsend Cresson; Memoirs of the American Entomological Society
On the Nesting Habits of Melissodes Latr. (Hymenop.), Clarence P. Custer; The Canadian Entomologist
Parasites of Some Anthidiine Bees (Hym. : Megachile, Chrysididae; Dipt. : Bombyliidae)., Clarence P. Custer; Entomological News
The Bee That Works in Stone; Perdita Opuntiae Cockerell, Clarence P. Custer; Psyche
Sainfoin for Bees, C. P. Dadant; American Bee Journal
Bees from the Genus Perdita in the J. C. Bridwell Collection (Hymenoptera), Philip H. Timberlake; Proceedings of the Hawaiian Entomological Society
Bees from the Genus Perdita Smith in the American Museum of Natural History (Hymenoptera), Philip H. Timberlake; American Museum Novitates
Two New Species of Bees of the Genus Perdita in the Collection of the California Academy of Sciences, Philip H. Timberlake; The Pan-Pacific Entomologist
Матар'ялы да пазнаньня фауны чмялёуБеларусi, М. Дабратворскi
1927
Apiden (Ins. Hym.) aus dem nordlichen und ostlichen Spanien, J. D. Alfken
Eine neue und eine wenig bekannte spanische Biene., J. D. Alfken; Konowia
Uber einige schwedische Bienen. 2. Abhandlung, J. D. Alfken; Entomologisk Tidskrift
Hymenopteres Melliferes Nouveaux du Maroc, M. Raymond Benoist; Bulletin de la Société des Sciences Naturelles du Maroc
Une Nouvelle Espece D'osmie D'algerie, R. Benoist; Ann. Soc. Entomol. France
The Utilization of Carbohydrates as Food by Honeybee Larvae, Lloyd M. Bertholf; Journal of Agricultural Research
Sobre las Hembras de las Especies Americanas de Scolia del Subgénero Campsomeris (Dielis) [Hymenoptera Scoliidae] con Color del Cuerpo y Ropaje Completamente Negros, James Chester Bradley; Los Anales de la Sociedad Científica Argentina
Observations on Wood-Boring Insects, Their Parasites and Other Associated Insects, Charles Thomas Brues; Psyche
The Parasites of Popillia Japonica in Japan and Chosen (Korea) and Their Introduction Into the United States, Curtis P. Clausen, J. L. King, and Cho Teranashi; Bulletin 1429, U.S. Department of Agriculture
Bees Collected by Dr. H. M. Smith on Turtle Island (Koh Tao), Gulf of Siam, T. D. A. Cockerell; Proceedings of the Entomological Society of Washington
Bees from Malay Peninsula, T. D. A. Cockerell; Annals and Magazine of Natural History
Bees of the Genera Agapostemon and Augochlora in the Collection of the California Academy of Sciences, T. D. A. Cockerell; The Pan-Pacific Entomologist
Hymenoptera from Lucban, Philippine Islands, T. D. A. Cockerell; The Philippine Journal of Science
Megachilid Bees from Bolivia Collected by the Mulford Biological Expedition, 1921-1922, T. D. A. Cockerell; Proceedings of the United States National Museum
Northern Types of Insects in Peru, T. D. A. Cockerell; The Entomologist
Some Australian Bees, T. D. A. Cockerell; The Entomologist
Some Bees, Principally from Formosa and China, T. D. A. Cockerell; American Museum Novitates
Some North and South American Bees, T. D. A. Cockerell; Annals of the Entomological Society of America
Two New Types of Desert Bees, T. D. A. Cockerell; The Pan-Pacific Entomologist
Notes on the Life-History of Two Oriental Chalcidoid Parasites of Chrysomphalus, Harold Compere and Harry S. Smith; University of California Publications in Entomology
Osmia Saundesi, Auguste Cros; Bull. & Ann. de la Soc. Entom. de Belg.
Nesting Habits of a Solitary Bee of the Genus Spinoliella of Ashmead, Clarence P. Custer; Psyche
Nesting Habits of Some Anthidiine Bees, Clarence P. Custer and Charles H. Hicks; Biological Bulletin
1926
Beitrag zur Kenntnis der Bienenfauna von Agypten., J. D. Alfken; Zool. Rec.
Fauna Buruana, J. D. Alfken; Treubia
Uber einige schwedische Bienen, J. D. Alfken; Zoo. Rec.
Uber Osmia manicata Morice, J. D. Alfken
Ueber einige Bienen aus Mesopotamien und Ostindien (Hym.), J. D. Alfken
Zur Unterscheidung von Anthophora retusa L. und A. aestivalis Pz. (Hym. Apid.), J. D. Alfken
North American Species of Two-winged Flies Belonging to the Tribe Miltogrammini, Harry W. Allen; Proceedings of the United States National Museum
Hymenopteres Melliferes des Environs de Paris, R. Benoist; Ann. Soc. Entomol. France
The date of publication of the Hymenoptera and Diptera described by Guerin in Duperrey's "Voyage de La Coquille"., Joseph Bequaert; Entomologische Mitteilungen
The Genus Eumenes, Latreille, in South Africa, with a Revision of the Ethiopian Species (Hymenoptera), Joseph Bequaert; Annals of the South African Museum
Two New Species of Chelogynus (Hymenoptera: Dryinidae) From New York State, James Chester Bradley; Proceedings of the Biological Society of Washington
V. Nachtrag zu „Friese, Bienen Afrikas", H. Brauns; Zoologische Jahrbücher. Abteilung für Systematik, Ökologie und Geographie der Tiere
Recherches Biologiques sur les Hyménoptères du Chili (Mellifères), E. C. Claude-Joseph; Ann. Sci. Nat. Zool.
Descriptions and Records of Bees — CIX, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees — CVIII, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees — CX, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees — CXI, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees — CXIII, T. D. A. Cockerell; Annals and Magazine of Natural History
New Halictine Bees from Australia, T. D. A. Cockerell; The Entomologist
Some Bees in the Collection of the California Academy of Sciences, T. D. A. Cockerell; The Pan-Pacific Entomologist
North American Bees of the Genus Panurginus, J. C. Crawford; Proceedings of the Entomological Society of Washington
La Défense des Plantes, A. Davidenko; Bulletin du Bureau Permanent des Congrès Entomo-Phytopathologiques de Russie
Nesting Habits and Parasites of Certain Bees of Boulder County, Colorado, Charles H. Hicks; University of Colorado Studies