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1931
Descriptions and Records of Bees - CXXV, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees - CXXVI, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees - CXXVII, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees - CXXVIII, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees - CXXX, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Hymenoptera, T. D. A. Cockerell; Annals and Magazine of Natural History
Heriadine and Related Bees from Liberia and the Belgian Congo (Hymenoptera, Apoidea), T. D. A. Cockerell; Rev. Zool. Bot Afr.
Rocky Mountain Bees. II, T. D. A. Cockerell; American Museum Novitates
Some African Bees, T. D. A. Cockerell; Annals and Magazine of Natural History
Some African Bees of the Genus Nomia, T. D. A. Cockerell; Annals and Magazine of Natural History
Some Bees Collected by Professor Jacot in China, T. D. A. Cockerell; American Museum Novitates
Some Notes on Bees of the Genus Andrena, T. D. A. Cockerell; The Canadian Entomologist
The Bee-genus Crocisaspidia, T. D. A. Cockerell; Annals and Magazine of Natural History
The Heriadine Bees of Morocco, T. D. A. Cockerell; The Entomologist
The Wild Bees of Morocco, T. D. A. Cockerell; Journal of the American Museum of Natural History
Two Genera of Bees New to the Recorded Fauna of Nova Scotia, T. D. A. Cockerell; The Canadian Entomologist
Rocky Mountain Bees. III, T. D. A. Cockerell and Ruth Sumner; American Museum Novitates
Biologie de l'Oxybelus Bipunctatus, A. Crèvecoeur; Ann. Soc. Ent. Belge.
Le Maraudage Occasionnel Tendance au Cleptoparasitisme Chez Divers Psammocharidae (Hym.), A. Crèvecoeur
1930
Beitrag zur Kenntnis der Bienenfauna von Agypten (Hym.), J. D. Alfken; Stettiner Entomologische Zeitung.
Die Apidae der Hamburgischen Sudarabien-Expedition C. Rathejens-H.v.WiBmann, J. D. Alfken; Sonderabdruck aus den Mitteilungen der Muncher Entomologischen Gesellschaft
Die Gruppe der Xylocopa olivieri Lep. (Hym. Apid.), J. D. Alfken
Die Insektenfauna der Mellum. Nochmals zum Problem der Besiedelung einer neuentstehden Insel., J. D. Alfken; Sounderabdruck aus Abh. Nat. Ver. Bremen
Uber einige Weibchen der Prosopis variegata-Gruppe. (Hym. Apid.), J. D. Alfken; Deutsch. Ent. Zeitschr.
Wissenschaftliche Ergebnisse Der Schwedischen Entomologischen Reisen Des Herrn Dr. A. Roman 1914-15 und 1923-24 in Amazonas, J. D. Alfken; Arkiv For Zoologi.
Zwei neue Bienen von Kreta. (Hym. Apid.), J. D. Alfken
Contribution to the Taxonomy of Asiatic Wasps of the Genus Tiphia (Scoliidae), H. W. Allen and H. A. Jaynes; Proceedings of the United States National Museum
Especes Francaises du genre Xylocopa, R. Benoist; Ann. Soc. Entomol. France
Hymenopteres Melliferes Nouveaux Du Maroc, Raymond Benoist; Bulletin de la Société des Sciences Naturelles du Maroc
Ashmead's Genus Polistella (Hymenopetera, Vespidae), Joseph Bequaert; The Pan-Pacific Entomologist
Nesting habits of Isodontia, a subgenus of Chlorion (Hymenoptera), Joseph Bequaert; Bulletin of the Brooklyn Entomological Society
On the Generic and Subgeneric Divisions of the Vespinae (Hymenoptera), Joseph Bequaert; Bulletin of the Brooklyn Entomological Society
Beitrag zur Kenntnis paläarktischer Arten der Gattung Epeolus. (Hym. Apid.), H. Bischoff; Deutsche Entomol. Zeitschrift
Entomologische Ergebnisse der Deutsch-Russischen Alai-Pamir-Expedition 1928 (II)., H. Bischoff; Mitteilungen aus dem Zoolog. Museum in Berlin
Entomologische Ergebnisse der schwedischen Kamtchatka-Expedition 1920-1922, H. Bischoff; Arkiv För Zoologi.
Inventa entomologica itineris Hispanici et Maroccani, quod a. 1926 fecerunt Harald et Håkan Lindberg., H. Bischoff; Societas Scientiarum Fennica Commentationes Biologicae
2.-Nomia Bakeri Considered a Subspecies of Nomia Nevadensis, Beulah Hix Blair; Rocky Mountain Bees
4.-Abdominal Structures of Nomia Zabriskii, Beulah Hix Blair; Rocky Mountain Bees
Stelis phaeoptera K. subsp. Nov. franconica (Hym. Apidae)., Paul Blüthgen; Archiv für Insektenkunde des Oberrheingebietes und der angrenzenden Länder
Über Psithyrus norvegicus Sparre-Schneider (Hym. Apid.)., Paul Blüthgen; Archiv für Insektenkunde des Oberrheingebietes und der angrenzenden Länder
Neue Bienen aus Süd-Afrika, H. Brauns; Konowia, Vienna
Further Pollination Studies with the McIntosh Apple in the Champlain Valley of New York, A. B. Burrell and L. H. MacDaniels; American Society for Horticultural Science
Additional Records of Chinese Bees, and One from Usbekistan, T. D.A. Cockerell; The Entomoogist
African Bees of the Family Anthophoridae, Cheifly from the Belgian Congo and Liberia (Hymenoptera, Apoidea), T. D.A. Cockerell; Rev. Zool. Bot. Atr.
African Bees of the Family Ctenoplectridae from the Belgian Congo and Liberia (Hymenoptera Apoidea), T. D.A. Cockerell; Rev. Zool. Bot. Atr.
African Bees of the Family Megachilidae, (Anthidiinae, Serapista and Lithurgus) mainly from Liberia and the Belgian Congo. (Hymenoptera, Apoidea), T. D.A. Cockerell; Rev. Zool. Bot. Afr.
African bees of the Family Xylocopidae Principally from Liberia and the Belgian Congo, T. D.A. Cockerell; Rev. Zool. Bot. Atr.
African Bees of the Genus Megachile, T. D.A. Cockerell; Annals and Magazine of Natural History
African Bees of the Genus Megachile, T. D.A. Cockerell; Annals and Magazine of Natural History
A New African Genus of Ceratinidae (Hymenoptera, Apoidea), T. D.A. Cockerell; Rev. Zool. Bot. Afr.
A New Subgenus of Andrenine Bees, T. D.A. Cockerell; The Pan-Pacific Entomologist
Australian Bees in the Museum of Camparative Zoology, T. D.A. Cockerell; Psyche
Bees from Mesa Verde, Colorado, in the American Museum of Natural History, T. D.A. Cockerell; American Museum Novitates
Descriptions and Records of Bees – CXXI, T. D.A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees – CXXII, T. D.A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees – CXXII., T. D.A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees – CXXIII, T. D.A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees – CXXIII., T. D.A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees – CXXIV, T. D.A. Cockerell; Annals and Magazine of Natural History
New Australian Bees, T. D.A. Cockerell; Memoirs of the Queensland Museum
Parasites of Mantidæ from New Caledonia, T. D.A. Cockerell; American Museum Novitates
The Bees of Australia, T. D.A. Cockerell; Austrailian Zoologist
The Bees of Australia cont., T. D.A. Cockerell; Austrailian Zoologist
The Genus Nomia, T. D.A. Cockerell; American Museum Novitates
The Xylocopid or Carpenter Bees of the Phillipine Islands, T. D.A. Cockerell; The Phillipine Journal of Science
Wasps of the Genus cerceris in the Queensland Museum, T. D.A. Cockerell; Memoirs of the Queensland Museum
Rocky Mountain Bees. I, T. D.A. Cockerell and Beular Hix Blair; American Museum Novitates
Evidence that Bombi Seeking their Nest are Guided by the Recognition of Local Features, Horace Donisthorpe; The Entomologist's Record and Journal of Variation
Early References to the Behavior of American Solitary Wasps, Richard P. Dow; Bulletin of the Brooklyn Entomological Society
The Canadian Field-Naturalist, Harrison F. Lewis, R. A. McKenzie, Ian McTaggart-Cowan, J. F. Brimley, J. C. Chritchell-Bullock, Arthur Gibson, Lawrence E. Potter, C. M. Sternberg, R. Delamere Black Jr., and R. F. Cain; The Canadian Field-Naturalist
A Note on the Parasitic Beetle, Hornia Minutipennis Riley, Phil Rau; Psyche
1929
Drei neue Andrena-Arten aus der Cyrenaica (Hym.), J. D. Alfken; Stettiner Entomologische Zeitung
Eine neue Melipona-Art aus British Ostafrika, J. D. Alfken; Sonder-Abdruck aus Konowia
Eine neue Pasttes-Art aus Turkmenien, J. D. Alfken
Entomologische Ergebnisse der Deutsch-Russischen Alai-Pamir-Expedition 1928, J. D. Alfken
Entomologische Ergebnisse der schwedischen Kamtschatka-Expedition 1920-1922, J. D. Alfken; Arkiv For Zoologi.
Ueber eine hymenopteren-Ausbeute von Malta, J. D. Alfken; Aus den Mitteilugen aus dem Entomolog. Verein Bremen
Bees of the Sub-Family Osminae in the Collection of the Brigham Young University, D. Elden Beck; Bulletin of the Brooklyn Entomological Society
Description D'une Espece Nouvelle Du Genre Osmia, M. R. Benoist; Ann. Soc. Entomol. France
Descriptions d'especes nouvelles du genre Osmia, R. Benoist; Bulletin de la Société Entomologique de France
D'une Nouvelle Espece D'Osmie du Japon, R. Benoist; Ann. Soc. Entomol. France
Les Heriades de la Faune Francaise, R. Benoist; Ann. Soc. Entomol. France
A New Pseudomasaris from California, with Some Considerations on the Masarid Wasps (Hymenoptera), Joseph Bequaert; Psyche
Podallonia Violaceipennis (Lepeletier), A Dimorphic Fossorial Wasp (Hymenoptera), Joseph Bequaert; Bulletin of the Brooklyn Entomological Society
The Folded-Winged Wasps of the Bermudas, with Some Preliminary Remarks on Insular Wasp Faunae, Joseph Bequaert; Annals of the Entomological Society of America
The Scoliidae described by Pallas (Hym.), H. Bischoff and J. C. Bradley; Deutsche Entomol. Zeitschrift
Über Einen Gynander Der Mauerbiene (Chalcodoma Muraria Retz.), H. Bischoff and W. Ulrich; Zeitschrift für Morphologie und Ökologie der Tiere
Zur Synonymie einiger Osmia- und Andrena-Arten und anderes. (Hym. Apidae.), Paul Blüthgen; Deutsch. Ent. Zeitschr.
Neue und auffallende Apiden aus Süd-Afrika, H. Brauns; Zeitschrift für wissenschaftliche Insektenbiologie
Pollination Study of the Anjou Pear in Hood River Valley, Gordon G. Brown and Leroy Childs; Agricultural Experiment Station Bulletin
Hymenoptera Collected on the "St. George" Expedition in Central America and the W. Indies, L. Evelyn Cheesman; Trans. Ent. Soc. London
A New Thynnid Wasp from New Caledonia, T. D. A. Cockerell; Psyche
Bees, Chiefly Australian Species, Described or Determined by Dr. H. Friese, T. D. A. Cockerell; American Museum Novitates
Bees from the Australian Region, T. D. A. Cockerell; American Museum Novitates
Bees in the Australian Museum Collection, T. D. A. Cockerell; Records of the Australian Museum
Bees in the Queensland Museum, T. D. A. Cockerell; Memoirs of the Queensland Museum
Descriptions and Records of Bees — CXIV, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees — CXIX, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees — CXV, T. D. A. Cockerell; Annals and Magazine of Natural History
Descriptions and Records of Bees — CXVII, T. D. A. Cockerell; Annals and Magazine of Natural History