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Cockerell, T.D.A. 1902. A new sawfly of the genus Xyela. The Canadian Entomologist 34:194.
Cockerell, T.D.A. 1903. Some North American bees: Osmia and Triepeolus. Entomological News 14:331-333.
Cockerell, T.D.A. 1903. Bees of the genus Nomada from California. Proceedings of the Academy of Natural Sciences of Philadelphia 55:559-579.
Cockerell, T.D.A. 1903. North-American bees, and a new Homopteron. The Annals and Magazine of Natural History ser. 7: v. 12:442-455.
Cockerell, T.D.A. 1903. A new bee of the genus Andrena. Entomological News 14 (7):215.
Cockerell, T.D.A. 1903. New bees from southern California and other records. Bulletin of the Southern California Academy of Science 2 (7):84-85.
Cockerell, T.D.A. 1903. Notes on the entomology of Pecos, New Mexico. The Canadian Entomologist 35:342-343.
Cockerell, T.D.A. 1903. Euthrips and Hedychridium in New Mexico. The Canadian Entomologist 35:262.
Cockerell, T.D.A. 1903. North American bees of the genus Nomada. Proceedings of the Academy of Natural Sciences of Philadelphia 55:580-614.
Cockerell, T.D.A. 1903. New american Hymenoptera, mostly of the genus Nomada. The Annals and Magazine of Natural History ser. 7: v. 12:200-214.
Cockerell, T.D.A. 1903. A catalogue of the bees of California. Psyche 10:74-78.
Cockerell, T.D.A. 1904. Some parasitic bees. The Annals and Magazine of Natural History ser. 7: v. 13:33-42.
Cockerell, T.D.A. 1904. New and little known bees in the collection of the British Museum. The Annals and Magazine of Natural History ser. 7: v. 14:203-207.
Cockerell, T.D.A. 1904. Notes on some bees in the British Museum. The Canadian Entomologist 36:301-304.
Cockerell, T.D.A. 1904. The bees of southern California. III. Bulletin of the Southern California Academy of Science 3 (4):56-60.
Cockerell, T.D.A. 1904. Some bees from San Miguel County, New Mexico. The Entomologist 37 (488):5-9.
Cockerell, T.D.A. 1904. The bees of southern California. V. Bulletin of the Southern California Academy of Science 3 (6):86-90.
Cockerell, T.D.A. 1904. The bees of southern California. IV. Bulletin of the Southern California Academy of Science 3 (5):72-76.
Cockerell, T.D.A. 1904. The bees of southern California. VI. Bulletin of the Southern California Academy of Science 3 (9):159-162.
Cockerell, T.D.A. 1904. New records of bees. The Entomologist 37:231-236.
Cockerell, T.D.A. 1904. The bees of southern California. II. Bulletin of the Southern California Academy of Science 3 (1):23-24.
Cockerell, T.D.A. 1904. Two new bees. Entomological News 15 (1):32-34.
Cockerell, T.D.A. 1904. Records of american bees. The Canadian Entomologist 36:13-14.
Cockerell, T.D.A. 1904. Descriptions and records of bees. The Annals and Magazine of Natural History ser. 7: v. 14:21-30.
Cockerell, T.D.A. 1904. The bees of Southern California. - I. Bulletin of the Southern California Academy of Science 3 (1):3-6.
Cockerell, T.D.A. 1905. American Hymenoptera: new bees and a new proctotrypid. The Annals and Magazine of Natural History ser. 7: v. 15 (86):200-204.
Cockerell, T.D.A. 1905. Descriptions and records of bees. - I. The Annals and Magazine of Natural History ser. 7: v. 16 (92):216-225.
Cockerell, T.D.A. 1905. Some bees of the genus Melissodes from the Rocky Mountain Region. The Annals and Magazine of Natural History ser. 7: v. 15 (90):521-529.
Cockerell, T.D.A. 1905. Some new Eucerine bees from the West. Psyche 12:98-104.
Cockerell, T.D.A. 1905. Bees collected by the Rev. G. Birkmann in Texas (Continued from page 267). The Canadian Entomologist 37 (9):334-335.
Cockerell, T.D.A. 1905. New and little-known american bees. The Entomologist 38 (505):145-149.
Cockerell, T.D.A. 1905. The bees of southern California. - VII. Bulletin of the Southern California Academy of Sciences 4 (1):13-15.
Cockerell, T.D.A. 1905. The bees of southern California. VIII. Bulletin of the Southern California Academy of Sciences 4 (2):28-33.
Cockerell, T.D.A. 1905. New bees from Colorado. Entomological News 16 (8):270-272.
Cockerell, T.D.A. 1905. The bees of the genus Nomada found in Colorado, with a table to separate all the species of the Rocky Mountains. Bulletin of the Colorado Agricultural Experiment Station 94:69-85.
Cockerell, T.D.A. 1905. Three new bees from the Southwest. Entomological News 16 (3):81-83.
Cockerell, T.D.A. 1905. The bees of southern California. Bulletin of the Southern California Academy of Sciences 4 (6/7):99-106.
Cockerell, T.D.A. 1905. A new bee of the genus Perdita from Texas. Entomological News 16 (10):331.
Cockerell, T.D.A. 1905. Diadasia Patton; a genus of bees. American Naturalist 39 (466):741-745.
Cockerell, T.D.A. 1905. Some bees collected by the Rev. G. Birkmann at Fedor, Texas. The Canadian Entomologist 37:265-267.
Cockerell, T.D.A. 1905. New bees of the genera Osmia and Andrena. The Canadian Entomologist 37 (11):370-372.
Cockerell, T.D.A. 1905. Notes on some bees in the British Museum. Transactions of the American Entomological Society 31:309-364.
Cockerell, T.D.A. 1905. New american bees. Proceedings of the Biological Society of Washington 18:177-184.
Cockerell, T.D.A. 1905. Une nouvelle abeille du Mexique. Bulletin du Muséum d’Histoire Naturelle 11:165.
Cockerell, T.D.A. 1906. The bees of New Mexico. Transactions of the American Entomological Society 32:289-314.
Cockerell, T.D.A. 1906. New american bees. - II. The Entomologist 39 (519):177-179.
Cockerell, T.D.A. 1906. Descriptions and records of bees. - VIII. The Annals and Magazine of Natural History ser. 7: v. 17 (98):222-230.
Cockerell, T.D.A. 1906. Descriptions and records of bees. - IX. The Annals and Magazine of Natural History ser. 7: v. 17 (99):306-317.
Cockerell, T.D.A. 1906. Descriptions and records of bees. - X. The Annals and Magazine of Natural History ser. 7: v. 17 (100):359-369.
Cockerell, T.D.A. 1906. Descriptions and records of bees. - XII. The Annals and Magazine of Natural History ser. 7: v. 18 (103):69-75.
Cockerell, T.D.A. 1906. New american bees. - I. The Entomologist 39 (517):125-127.
Cockerell, T.D.A. 1906. New american bees. - I. (Concluded from p. 127.). The Entomologist 39 (518):148-150.
Cockerell, T.D.A. 1906. The North American bees of the family Anthophoridae. Transactions of the American Entomological Society 32 (1):63-116.
Cockerell, T.D.A. 1906. New Rocky Mountain bees, and other notes. The Canadian Entomologist 38 (5):160-166.
Cockerell, T.D.A. 1906. The bees of Florissant, Colorado. Bull. American Mus. Nat. Hist. 22:419-455.
Cockerell, T.D.A. 1907. Descriptions and records of bees. - XVII. The Annals and Magazine of Natural History ser. 7: v. 20 (119):445-451.
Cockerell, T.D.A. 1907. Descriptions and records of bees. - XVI. The Annals and Magazine of Natural History ser. 7: v. 20 (116):122-132.
Cockerell, T.D.A. 1907. Descriptions and records of bees. - XV. The Annals and Magazine of Natural History ser. 7: v. 20 (115):59-68.
Cockerell, T.D.A. 1907. New american bees. - III. The Entomologist 40 (529):135-138.
Cockerell, T.D.A. 1907. A new bee of the genus Anthophora. The Canadian Entomologist 39 (10):354.
Cockerell, T.D.A. 1907. New american bees. - IV. The Entomologist 40 (528):97-100.
Cockerell, T.D.A. 1907. New american bees. - V. The Entomologist 40 (535):265-269.
Cockerell, T.D.A. 1907. On a collection of Australian and Asiatic bees. Bulletin of the American Museum of Natural History 23:211-236.
Cockerell, T.D.A. 1907. Notes on the nomenclature of some Hymenoptera. The Entomologist 40 (526):49-51.
Cockerell, T.D.A. 1907. A new saw-fly of the genus Xyela. The Canadian Entomologist 39 (9):324.
Cockerell, T.D.A. 1907. Two new bees of the genus Triepeolus. The Canadian Entomologist 39:51-52.
Cockerell, T.D.A. 1907. The bees of Boulder County, Colorado. University of Colorado Studies 4:239-259.
Cockerell, T.D.A. 1907. New Anthidiinae bees from Colorado. The Canadian Entomologist 39:135-136.
Cockerell, T.D.A. 1907. Descriptions and records of bees. - XIII. The Annals and Magazine of Natural History ser. 7: v. 19 (113):361-370.
Cockerell, T.D.A. 1907. Descriptions and records of bees. - XIV. The Annals and Magazine of Natural History ser. 7: v. 19 (114):531-540.
Cockerell, T.D.A. 1908. Descriptions and records of bees. - XIX. The Annals and Magazine of Natural History ser. 8: v. 1 (4):337-344.
Cockerell, T.D.A. 1908. Some bees of the genus Halictus. Proceedings of the Entomological Society of Washington 9:119-120.
Cockerell, T.D.A. 1908. New american bees. - VI. The Entomologist 41:59-61.
Cockerell, T.D.A. 1908. New american bees. - VII. The Entomologist 41:292-294.
Cockerell, T.D.A. 1908. A new name in Megachile. The Canadian Entomologist 40 (12):460.
Cockerell, T.D.A. 1908. Descriptions and records of bees. - XX. The Annals and Magazine of Natural History ser. 8: v. 2 (10):323-334.
Cockerell, T.D.A. 1908. New and little-known bees. The Canadian Entomologist 40:234-235.
Cockerell, T.D.A. 1908. Descriptions and records of bees. - XVIII. The Annals and Magazine of Natural History ser. 8: v. 1 (3):259-267.
Cockerell, T.D.A. 1909. Descriptions and records of bees. - XXI. The Annals and Magazine of Natural History ser. 8: v. 4 (19):25-31.
Cockerell, T.D.A. 1909. Two new bees of the genus Perdita, visiting Baileya in New Mexico. The Canadian Entomologist 41 (5):151-152.
Cockerell, T.D.A. 1909. Two new bees. The Canadian Entomologist 41 (1):35-37.
Cockerell, T.D.A. 1909. Three new Anthophorid bees from Texas. The Entomologist 42 (553):147-149.
Cockerell, T.D.A. 1909. Some new bees, and other notes. The Canadian Entomologist 41 (4):128-131.
Cockerell, T.D.A. 1909. Descriptions and records of bees. - XXIII. The Annals and Magazine of Natural History ser. 8: v. 4 (23):393-404.
Cockerell, T.D.A. 1909. Some new bees of the genus Coelioxys. Entomological News 20 (1):8-9.
Cockerell, T.D.A. 1909. New North American bees. The Canadian Entomologist 41 (11):393-395.
Cockerell, T.D.A. 1910. Some bees from Eldora, Colorado. Psyche 17 (6):244-247.
Cockerell, T.D.A. 1910. Some bees of the genus Augochlora from the West Indies. Proceedings of the United States National Museum 37 (1717):489-494.
Cockerell, T.D.A. 1910. Descriptions and records of bees. - XXVIII. The Annals and Magazine of Natural History ser. 8: v. 5 (29):409-419.
Cockerell, T.D.A. 1910. Descriptions and records of bees. - XXIV. The Annals and Magazine of Natural History ser. 8: v. 5 (25):22-30.
Cockerell, T.D.A. 1910. Descriptions and records of bees. - XXVII. The Annals and Magazine of Natural History ser. 8: v. 5 (28):361-369.
Cockerell, T.D.A. 1910. Descriptions and records of bees. - XXVI. The Annals and Magazine of Natural History ser. 8: v. 5 (27):256-264.
Cockerell, T.D.A. 1910. Descriptions and records of bees. - XXXII. The Annals and Magazine of Natural History ser. 8: v. 6 (33):272-284.
Cockerell, T.D.A. 1910. Descriptions and records of bees. - XXXIII. The Annals and Magazine of Natural History ser. 8: v. 6 (34):356-366.
Cockerell, T.D.A. 1910. New and little-known bees. Transactions of the American Entomological Society 36:199-249.
Cockerell, T.D.A. 1910. New bees of the genus Osmia from California. Entomological News 21 (3):120-122.
Cockerell, T.D.A. 1910. The North American bees of the genus Nomia. Proceedings of the United States National Museum 38:289-298.
Cockerell, T.D.A. 1910. Some neotropical bees. Psyche 17:142-144.
Cockerell, T.D.A. 1910. New and little-known western bees. Entomological News 21 (6):270-273.
Cockerell, T.D.A. 1910. The fossil Crabronidae. The Entomologist 43:60-61.