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Cockerell, T.D.A. 1898. New and little-known bees from Washington State. Proceedings of the Academy of Natural Sciences of Philadelphia 50:50-56.
Cockerell, T.D.A. 1898. On some Panurginae and other bees. Transactions of the American Entomological Society 25:185-198.
Cockerell, T.D.A. 1898. Panurginus clypeatus. The Canadian Entomologist 30:29.
Cockerell, T.D.A. 1899. Four new bees of the genus Perdita collected by Dr. L. O. Howard in Mexico. Annals and Magazine of Natural History ser. 7 (3):492-495.
Cockerell, T.D.A. 1899. Notes on some Hymenoptera. The Canadian Entomologist 31:255-256.
Cockerell, T.D.A. 1899. Catálogo de las Abejas de Mexico. Biblioteca Agricola de las Secretaria de Fomento, Mexico, 1-20.
Cockerell, T.D.A. 1899. The bees of Kansas. Entomological News 10:3-4.
Cockerell, T.D.A. 1900. Observations on bees collected at Las Vegas, New Mexico, and in the adjacent Mountains. Annals and Magazine of Natural History ser. 7 (5):401-415.
Cockerell, T.D.A. 1900. Notes on New Mexico bees. The Canadian Entomologist 32:361-364.
Cockerell, T.D.A. 1900. The New Mexico bees of the genus Megachile and a new Andrena. Annals and Magazine of Natural History ser. 7 (6):7-20.
Cockerell, T.D.A. 1901. Some insects of the Hudsonian Zone in New Mexico. - VI. Psyche 9:282-286.
Cockerell, T.D.A. 1901. Contributions from the New Mexico Biological Station. - X. Observations on bees collected at Las Vegas, New Mexico, and in the adjacent Mountains. II. Annals and Magazine of Natural History ser. 7 (7):125-131.
Cockerell, T.D.A. 1901. Some insects of the Hudsonian Zone in New Mexico. - V. Psyche 9:272-273.
Cockerell, T.D.A. 1902. Additions to the fauna of Mexico (Bees and Coccidae). The Entomologist 35 (470):177-178.
Cockerell, T.D.A. 1902. New bees of the genus Andrena, from Wisconsin. The Canadian Entomologist 34:45-47.
Cockerell, T.D.A. 1902. North-American bees of the genus Andrena. Annals and Magazine of Natural History ser. 7 (9):101-106.
Cockerell, T.D.A. 1902. The bee-genus Xenoglossa in California. Entomological News 13 (3):103.
Cockerell, T.D.A. 1902. A new sawfly of the genus Xyela. The Canadian Entomologist 34:194.
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. Annals and Magazine of Natural History ser. 7 (12):442-455.
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. Annals and Magazine of Natural History ser. 7 (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. Annals and Magazine of Natural History ser. 7 (13):33-42.
Cockerell, T.D.A. 1904. New and little known bees in the collection of the British Museum. Annals and Magazine of Natural History ser. 7 (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. Records of american bees. The Canadian Entomologist 36:13-14.
Cockerell, T.D.A. 1904. Descriptions and records of bees. Annals and Magazine of Natural History ser. 7 (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. Some bees of the genus Melissodes from the Rocky Mountain Region. Annals and Magazine of Natural History ser. 7 (15):521-528.
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. 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. Proc. Biol. Soc. Washington 18:177-184.
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 39:177-179.
Cockerell, T.D.A. 1906. The North American bees of the family Anthophoridae. Transactions of the American Entomological Society 32:63-116.
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. Two new bees of the genus Triepeolus. The Canadian Entomologist 39:51-52.
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. Annals and Magazine of Natural History ser. 7:361-370.
Cockerell, T.D.A. 1907. Descriptions and records of bees.—XIV. Annals and Magazine of Natural History ser. 7:531-540.
Cockerell, T.D.A. 1908. New and little-known bees. The Canadian Entomologist 40:234-235.
Cockerell, T.D.A. 1909. Descriptions and records of bees. Annals and Magazine of Natural History ser. 8 (4):393-404.
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.pdf. Proceedings of the United States National Museum 37 (1717):489-494.
Cockerell, T.D.A. 1910. Descriptions and records of bees.-XXIV. Annals and Magazine of Natural History ser. 8 (5):22-29.
Cockerell, T.D.A. 1910. Descriptions and records of bees.-XXXII. Annals and Magazine of Natural History ser. 8 (6):272-284.
Cockerell, T.D.A. 1910. Descriptions and records of bees.-XXXIII. Annals and Magazine of Natural History ser. 8 (6):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. The fossil Crabronidae. The Entomologist 43:60-61.
Cockerell, T.D.A. 1910. Some new american bees. The Canadian Entomologist 42:169-171.
Cockerell, T.D.A. 1911. Bees in the collection of the U. S. National Museum. 1. Proceedings of the United States National Museum 39:635-658.
Cockerell, T.D.A. 1911. Bees in the collection of the United States National Museum. 2. Proceedings of the United States National Museum 40 (1818):241-264.
Cockerell, T.D.A. 1911. Descriptions and records of bees.-XL. Annals and Magazine of Natural History ser. 8 (8):763-770.
Cockerell, T.D.A. 1911. Descriptions and records of bees.-XXXVIII. Annals and Magazine of Natural History ser. 8 (8):283-290.
Cockerell, T.D.A. 1911. New and little known bees. Transactions of the American Entomological Society 37:217-241.
Cockerell, T.D.A. 1911. Descriptions and records of bees.—XXXIX. Annals and Magazine of Natural History ser. 8 (8):660-673.
Cockerell, T.D.A. 1912. New and little-known bees. The Entomologist 45:175-178.
Cockerell, T.D.A. 1912. Descriptions and records of bees. - XLV. Annals and Magazine of Natural History ser. 8 (10):21-31.
Cockerell, T.D.A. 1912. Descriptions and records of bees. - XLVII. Annals and Magazine of Natural History ser. 8 (10):484-494.
Cockerell, T.D.A. 1912. Names applied to bees of the genus Nomada, found in North America. Proceedings of the United States National Museum 41:225-243.
Cockerell, T.D.A. 1912. Names applied to bees of the genus Osmia, found in North America. Proceedings of the United States National Museum 42:215-225.
Cockerell, T.D.A. 1912. Descriptions and records of bees.- XLIV. Annals and Magazine of Natural History ser. 8 (9):554-568.
Cockerell, T.D.A. 1912. New bees from Brazil. Psyche 19 (2):41-61.
Cockerell, T.D.A. 1912. Descriptions and records of bees - XLI. Annals and Magazine of Natural History ser. 8 (9):139-149.
Cockerell, T.D.A. 1912. Descriptions and records of bees - XLVI. Annals and Magazine of Natural History ser. 8 (10):311-320.
Cockerell, T.D.A. 1912. Canadian bees in the British Museum. The Canadian Entomologist 44:354-358.
Cockerell, T.D.A. 1913. Descriptions and records of bees .-LIV. Annals and Magazine of Natural History ser. 8 (12):368-376.
Cockerell, T.D.A. 1913. Meliponine bees from Central America. Psyche 20:10-14.
Cockerell, T.D.A. 1913. Descriptions and records of bees.-LII. Annals and Magazine of Natural History ser. 8 (11):530-542.
Cockerell, T.D.A. 1913. Descriptions and records of bees.-LIII. Annals and Magazine of Natural History ser. 8 (12):103-110.
Cockerell, T.D.A. 1913. Names applied to the Eucerine bees of North America. Proceedings of the United States National Museum 43:261-273.
Cockerell, T.D.A. 1914. Bees from Ecuador and Peru. Journal of the New York Entomological Society 22:306-329.
Cockerell, T.D.A. 1914. Descriptions and records of bees -LX. Annals and Magazine of Natural History ser. 8 (14):1-13.
Cockerell, T.D.A. 1914. Descriptions and records of bees.-LXIII. Annals and Magazine of Natural History ser. 8 (14):361-369.
Cockerell, T.D.A. 1914. Descriptions and records of bees -LVIII. Annals and Magazine of Natural History ser. 8 (13):424-433.
Cockerell, T.D.A. 1915. Descriptions and records of bees - LXVIII. Annals and Magazine of Natural History ser. 8 (16):1-9.
Cockerell, T.D.A. 1915. Descriptions and records of bees.-LXV. Annals and Magazine of Natural History ser. 8 (15):261-269.
Cockerell, T.D.A. 1915. Descriptions and records of bees.-LXVII. Annals and Magazine of Natural History ser. 8 (15):529-537.
Cockerell, T.D.A. 1915. Names applied to the North American bees of the genera Lithurgus, Anthidium, and allies. Proceedings of the United States National Museum 47:87-94.
Cockerell, T.D.A. 1916. Descriptions and records of bees -LXXII. Annals and Magazine of Natural History ser. 8 (17):428-434.
Cockerell, T.D.A. 1916. Some California bees. The Canadian Entomologist 48:391-393.
Cockerell, T.D.A. 1916. Descriptions and records of bees. -LXXI. Annals and Magazine of Natural History ser. 8 (17):277-287.
Cockerell, T.D.A. 1917. . Entomological News 28:-363-.
Cockerell, T.D.A. 1917. New social bees. Psyche 24 (4):120-128.
Cockerell, T.D.A. 1917. Some euglossine bees. The Canadian Entomologist 49 (4):144-146.
Cockerell, T.D.A. 1918. Descriptions and records of bees. -LXXXII. Annals and Magazine of Natural History ser. 9 (2):476-482.
Cockerell, T.D.A. 1918. Neotropical bees, principally collected by Professor Bruner in Argentina. Transactions of the American Entomological Society 44:25-38.
Cockerell, T.D.A. 1918. Some bees of the genus Panurginus (Hym.). Entomological News 29:169-171.
Cockerell, T.D.A. 1918. Bees from British Guiana. Bull. American Mus. Nat. Hist. 38:685-690.
Cockerell, T.D.A. 1919. The bees of Peaceful Valley, Colorado. Journal of the New York Entomological Society 27:298-300.
Cockerell, T.D.A. 1919. Descriptions and records of bees.-LXXIII. Annals and Magazine of Natural History ser. 9 (3):118-125.
Cockerell, T.D.A. 1919. Neocorynura, a genus of Halictine bees (Hym.). Entomological News 30:158-159.
Cockerell, T.D.A. 1919. Bees in the collection of the United States National Museum. Proceedings of the United States National Museum 55 (2264):167-221.
Cockerell, T.D.A. 1920. Some neotropical Meliponid bees. Bull. Amer. Mus. Nat. Hist. 42:459-468.
Cockerell, T.D.A. 1921. Some parasitic Megachilid bees of the Western United States. American Museum Novitates 21:1-11.