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1904
Om Cellbyggnad Och Tjufbin Hos Trachusa Serratulae, Gottfrid Adlerz; Zool. Rec.
Die Forstersche Monographie der Bienen-Gattung Hylaeus F. (Latr.) = Prosopis F. und die Prosopis-Sammlung Forsters, J. D. Alfken; Separat-Abdruck aus Abh. Nat. Ver. Brem.
Die Gruppe der Andrena varians K., J. D. Alfken
Neue palaearktische Prosopis-Arten und -Varietaten, J. D. Alfken; Zeitscht. Hym. Dipt.
A List of the Hymenoptera of the Phillipine Islands, with Descriptions of New Species, William H. Ashmead; Journal of the New York Entomological Society
A New Genus and Some New Species of Hymenoptera from the Phillipine Islands, William H. Ashmead; The Canadian Entomologist
Descriptions of New Genera and Species of Hymenoptera from the Phillipine Islands, William H. Ashmead; Proceedings of the U.S. National Museum
Descriptions of Two New Hymenoptera from Japan - I, William H. Ashmead; Journal of the New York Entomological Society
Hymenoptera of Alaska, William Harris Ashmead; Proceedings of the Washington Academy of Sciences
Svensk Insektfauna Steklar Gaddsteklar Andra Rofsteklar, C. Aurivillius; Entomologisk Tidskrift Arg.
Descriptions of New Genera and Species of Hymenoptera from India, Peter Cameron
Descriptions of New Species of Aculeate and Parasitic Hymenoptera from Northern India, Peter Cameron; The Annals and magazine of natural history, zoology, botany, and geology
On Some New Genera and Species of Hymenoptera, Peter Cameron; Entom.
On Some New Genera and Species of Hymenoptera from Cape Colony and Transvaal, Peter Cameron; Transactions of the South African Philosophical Society
On Some New Species of Hymenoptera from Northern India, Peter Cameron; Annals and Magazine of Natural History
New and Little-Known Bees in the Collection of the British Museum, T. D. A. Cockerell; Annals and Magazine of Natural History
New Genera of Bees, T. D. A. Cockerell; Entomological News
Notes on Some Bees in the British Museum, T. D. A. Cockerell; The Canadian Entomologist
Records of American Bees, T. D. A. Cockerell; The Canadian Entomologist
Some Bees From San Miguel County, New Mexico, T. D. A. Cockerell; The Entomologist
Some Little-Known Bees of the Genus Colletes, T. D. A. Cockerell; Entomological News
Some Parasitic Bees, T. D. A. Cockerell; Annals and Magazine of Natural History
Taxonomy Cockerell — Epeolus remigatus var. martini, T. D. A. Cockerell; Annals and Magazine of Natural History
The Bee-Genus Apista, and Other Notes, T. D. A. Cockerell; The Canadian Entomologist
The Bee Genus Apista, etc., T. D. A. Cockerell; The Canadian Entomologist
The Bees of Southern California, T. D. A. Cockerell; Bulletin of the Southern California Academy of Sciences
The Bees of Southern California.— I., T. D. A. Cockerell; Bulletin of the Southern California Academy of Sciences
The Bees of Southern California.— II., T. D. A. Cockerell; Bulletin of the Southern California Academy of Sciences
The Bees of Southern California.— III., T. D. A. Cockerell; Bulletin of the Southern California Academy of Sciences
The Bees of Southern California.— IV., T. D. A. Cockerell; Bulletin of the Southern California Academy of Sciences
The Bees of Southern California.— V., T. D. A. Cockerell; Bulletin of the Southern California Academy of Sciences
The Bees of Southern California.— VI., T. D. A. Cockerell; Bulletin of the Southern California Academy of Sciences
The Halictine Bees of the Australian Region, T. D. A. Cockerell; Annals and Magazine of Natural History
Two New Bees, T. D. A. Cockerell; Entomological News
A New Bee in the Genus Diphaglossa, J. C. Crawford Jr.; The Canadian Entomologist
Two New Halictus from New Jersey, J. C. Crawford Jr.; Entomological News
Report of the Entomologist, Clarence P. Gillette, Lawrence Bruner, and T. D. A. Cockerell; Bulletin No. 94, Report of Entomologist Agricultural Experiment Station of Colorado Agricultural College for 1904
1903
Zwei neue Bienen aus Japan. (Hym.), J. D. Alfken; Zool. Rec.
A New Ammoplanus, William H. Ashmead; Entomological News
A New Paranomia from British Columbia, William H. Ashmead; The Canadian Entomologist
Classification of the Fossorial, Predateous and Parasitic Wasps, or the Superfamily Vespoidea No.11, William H. Ashmead; The Canadian Entomologist
Classification of the Fossorial, Predateous and Parasitic Wasps, or the Superfamily Vespoidea No.12, William H. Ashmead; The Canadian Entomologist
Classification of the Fossorial, Predateous and Parasitic Wasps, or the Superfamily Vespoidea No.13, William H. Ashmead; The Canadian Entomologist
Classification of the Fossorial, Predateous and Parasitic Wasps, or the Superfamily Vespoidea No.17, William H. Ashmead; The Canadian Entomologist
Svensk Insektfauna Trettonde Steklar, C. Aurivillius; Entomologisk Tidskrift Arg.
On the Hymenoptera collected by Mr. W. L. Distant in the Transvaal, South Africa, with Descriptions of supposed new Species., C. T. Bingham; Ann. Mag. Nat. Hist.
On the Sleeping Habits of Some Aculeate Hymenoptera, Charles Thomas Brues; Journal of the New York Entomological Society
Studies of Texan Bees Part I., Charles Thomas Brues; Entomological News
Some Notes on the Bee Genus Andrena, Lawrence Bruner; Transactions of the American Entomological Society
Hymenopteres nouveax du Congo, R. Buysson; Bull. Mus. Paris
Monographie Des Guepes ou Vespa, R. Buysson; Annales de la Societe Entomologique de France
Descriptions of New Genera and Species of Hymenoptera taken by Mr. Robert Shelford at Sarawak, Borneo, Peter Cameron; R. A. Soc.
Descriptions of New Species of Hymenoptera taken by Mr. Edward Whymper on the "Higher Andes of the Equator", Peter Cameron; Trans. Am. Ent. Soc.
Hymenoptera, Peter Cameron; The Fauna and Geography of the Maldive and Laccadive Archipelagoes
On Some New Genera and Species of Hymenoptera (Ichneumonidae, Chrysididae, Fossores, and Apidae), Peter Cameron
On Some New Genera and Species of Parasitic and Fossorial Hymenoptera from the Khasia Hills, Assam. [Concluded from p. 185], Peter Cameron; Annals and Magazine of Natural History
VI. Descriptions of nineteen new species of Larridae, Odynerus and Apidae from Barrackpore., Peter Cameron; Trans. Am. Ent. Soc. Lond.
XX. - On Some New Genera and Species of Parasitic and Fossorial Hymenoptera from the Khasia Hills, Assam., Peter Cameron; Annals and Magazine of Natural History
A Catalogue of the Bees of California, T. D. A. Cockerell; Psyche
Additions to the Fauna of Mexico (Bees and Coccidæ), T. D. A. Cockerell; The Entomologist
A New Bee of the Genus Andrena, T. D. A. Cockerell; Entomological News
A New Bee of the Genus Andronicus, T. D. A. Cockerell; Bulletin of the Southern California Academy of Sciences
A New Oak-Gall, T. D. A. Cockerell; The Canadian Entomologist
Bees of the Genus Nomada From California, T. D. A. Cockerell; Proceedings of the Academy of Natural Sciences of Philadelphia
New American Hymenoptera, mostly of the Genus Nomada, T. D. A. Cockerell; Annals and Magazine of Natural History
New Bees from Southern California and Other Records, T. D. A. Cockerell; Bulletin of the Southern California Academy of Sciences
North-American Bees, and a New Homopteron, T. D. A. Cockerell; Annals and Magazine of Natural History
North American Bees of the Genus Nomada, T. D. A. Cockerell; Proceedings of the Academy of Natural Sciences of Philadelphia
Notes on Five Species of Megachile, T. D. A. Cockerell; The Canadian Entomologist
Notes on Some Genera of Bees, T. D. A. Cockerell; Transactions of the American Entomological Society
Notes on the Bee: Genus Apis, T. D. A. Cockerell; The Entomologist
Notes on the Bee-Genus Halictus, T. D. A. Cockerell; The Entomologist
Notes on the Entomology of Pecos, New Mexico, T. D. A. Cockerell; The Canadian Entomologist
Some North American Bees: Osmia and Triepeolus, T. D. A. Cockerell; Entomological News
The Bees of the Genus Nomada Found in Colorado, With a Table to Separate All the Species of the Rocky Mountains, T. D. A. Cockerell; Bulletin No. 94, Report of Entomologist Colorado Experiment Station for 1903
The Nesting of a Carpenter Bee, Wilmatte Porter Cockerell; Birds and Nature Magazine
A New Bombus from Costa Rica, J. C. Crawford Jr.; The Canadian Entomologist
A New Genus of Bees, J. C. Crawford Jr.; The Canadian Entomologist
Some Nebraska Bees, J. C. Crawford Jr.; The Canadian Entomologist
Introduction: Narrative and Route of the Expedition, John Stanley Gardiner; The Fauna and Geography of the Maldive and Laccadive Archipelagoes
Hymenoptera of Beulah, New Mexico, Henry L. Viereck and T. D. A. Cockerell; Transactions of the American Entomological Society
1902
Zur Kenntnis der Prosopis annularis K. (= dilatata K.)- Gruppe. (Hym.), J. D. Alfken; Aus der Zeitschrift fur Hymenopterologie und Dipterologie
Classification of the Fossorial, Predateous and Parasitic Wasps, or the Superfamily Vespoidea No.10, William H. Ashmead; The Canadian Entomologist
Classification of the Fossorial, Predateous and Parasitic Wasps, or the Superfamily Vespoidea No.5, William H. Ashmead; The Canadian Entomologist
Classification of the Fossorial, Predateous and Parasitic Wasps, or the Superfamily Vespoidea No.6, William H. Ashmead; The Canadian Entomologist
Classification of the Fossorial, Predateous and Parasitic Wasps, or the Superfamily Vespoidea No.7, William H. Ashmead; The Canadian Entomologist
Classification of the Fossorial, Predateous and Parasitic Wasps, or the Superfamily Vespoidea No.8, William H. Ashmead; The Canadian Entomologist
Classification of the Fossorial, Predateous and Parasitic Wasps, or the Superfamily Vespoidea No.9, William H. Ashmead; The Canadian Entomologist
Papers from the Harriman Alaska Expedition, William Harris Ashmead; Proceedings of the Washington Academy of Sciences
Sleeping Habits of Certain Hymenoptera, Nathan Banks; Journal of the New York Entomological Society
Die Apidengattung Fidelia Friese (Hym.), H. Brauns; Zeitschrift für Systematische Hymenopterologie und Dipterologie
Identification de quelques Megachiles, R. Buysson; Ann. Soc. Ent. France
Nidification de Quelques Megachiles, R. Buysson; Ann. Soc. Ent. France
Art. XXXII - A List of the Hymenoptera of New Zealand, Peter Cameron; Transactions of the New Zealand Insitute
Description of New Species of Aculeate Hymenoptera from Borneo, Peter Cameron
On the Hymenoptera collected by Mr. Robert Shelford at Sarawak, and on the Hymenoptera of the Sarawak Museum, Peter Cameron
A New Bee of the Genus Bombomelecta, T. D. A. Cockerell; The Canadian Entomologist
Colletes crucis, T. D. A. Cockerell; Entomological News
Flowers and Insects in New Mexico, T. D. A. Cockerell; The American Naturalist
Hymenoptera of Southern California. I, T. D. A. Cockerell; Bulletin of the Southern California Academy of Sciences