Smith, M. R. 1943c. Pheidole (Macropheidole) rhea Wheeler, a valid species (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 45:5-9. PDF
Smith, M. R. 1943d. The first record of Leptothorax, subgenus Goniothorax Emery, in the United States, with the description of a new species. Proceedings of the Entomological Society of Washington 45:154-156. PDF
Smith, M. R. 1943e. A generic and subgeneric synopsis of the male ants of the United States. American Midland Naturalist 30:273-321. PDF
Smith, M. R. 1943f. A new male legionary ant from the Mojave Desert, California. Lloydia 6:196-197. PDF
Smith, M. R. 1944a. Ants of the genus Cardiocondyla Emery in the United States. Proceedings of the Entomological Society of Washington 46:30-41. PDF
Smith, M. R. 1944b. The ants of the genus Thaumatomyrmex Mayr with the description of a new Panamanian species (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 46:97-99. PDF
Smith, M. R. 1944c. A key to the genus Acanthognathus Mayr, with the description of a new species (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 46:150-152. PDF
Smith, M. R. 1944d. Additional ants recorded from Florida, with descriptions of two new subspecies. Florida Entomologist 27:14-17. PDF
Smith, M. R. 1944e. The genus Lachnomyrmex, with the description of a second species (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 46:225-228. PDF
Smith, M. R. 1944f. A second species of Glamyromyrmex Wheeler (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 46:254-256. PDF
Smith, M. R. 1946. A second species of Stegomyrmex, and the first description of a Stegomyrmex worker (Hymenoptera: Formicidae). Revista de Entomologia (Rio de Janeiro) 17:286-289. PDF
Smith, M. R. 1947a. Ants of the genus Cryptocerus F., in the United States. Proceedings of the Entomological Society of Washington 49:29-40. PDF
Smith, M. R. 1947b ("1946"). Ants of the genus Apsychomyrmex Wheeler (Hymenoptera: Formicidae). Revista de Entomologia (Rio de Janeiro) 17:468-473. PDF
Smith, M. R. 1947c. A new and extraordinary Pheidole from New Guinea (Hymenoptera, Formicidae). Proceedings of the Entomological Society of Washington 49:73-75. PDF
Smith, M. R. 1947d. A new species of Metapone Forel from New Guinea (Hymenoptera, Formicidae). Proceedings of the Entomological Society of Washington 49:75-77. PDF
Smith, M. R. 1947e. A new species of Megalomyrmex from Barro Colorado Island, Canal Zone (Hymenoptera, Formicidae). Proceedings of the Entomological Society of Washington 49:101-103. PDF
Smith, M. R. 1947f. A generic and subgeneric synopsis of the United States ants, based on the workers. American Midland Naturalist 37:521-647. PDF
Smith, M. R. 1947g. A study of Polyergus in the United States, based on the workers (Hymenoptera: Formicidae). American Midland Naturalist 38:150-161. PDF
Smith, M. R. 1947h. Notes on Pheidole (Decapheidole) and the description of a new species (Hymenoptera: Formicidae). Revista de Entomologia (Rio de Janeiro) 18:193-196. PDF
Smith, M. R. 1947i. A new genus and species of ant from Guatemala (Hymenoptera, Formicidae). Journal of the New York Entomological Society 55:281-284. PDF
Smith, M. R. 1948. A new species of Myrmecina from California (Hymenoptera, Formicidae). Proceedings of the Entomological Society of Washington 50:238-240. PDF
Smith, M. R. 1949a ("1948"). A new genus and species of ant from India (Hymenoptera: Formicidae). Journal of the New York Entomological Society 56:205-208. PDF
Smith, M. R. 1949b. A new species of Probolomyrmex from Barro Colorado Island, Canal Zone (Hymenoptera, Formicidae). Proceedings of the Entomological Society of Washington 51:38-40. PDF
Smith, M. R. 1949c. On the status of Cryptocerus Latreille and Cephalotes Latreille (Hymenoptera: Formicidae). Psyche (Cambridge) 56:18-21. PDF
Smith, M. R. 1949d. A new species of Camponotus, subg. Colobopsis from Mexico (Hymenoptera: Formicidae). Journal of the New York Entomological Society 57:177-181. PDF
Smith, M. R. 1949e. A new Leptothorax commonly inhabiting the canyon live oak of California (Hymenoptera: Formicidae). Psyche (Cambridge) 56:112-115. PDF
Smith, M. R. 1950a. On the status of Leptothorax Mayr and some of its subgenera. Psyche (Cambridge) 57:29-30. PDF
Smith, M. R. 1950b. [Review of: Creighton, W. S. 1950. The ants of North America. Bulletin of the Museum of Comparative Zoology 104:1-585.]. Proceedings of the Entomological Society of Washington 52:274-275. PDF
Smith, M. R. 1950c. Order Hymenoptera. Ants. Family Formicidae. Pp. 261-300 in: Weinman, C. J. (ed.) 1950. Pest control technology. Entomological section. New York: National Pest Control Association, vii + 365 + [50] pp.
Smith, M. R. 1951a. [Review of: Creighton, W. S. 1950. The ants of North America. Bulletin of the Museum of Comparative Zoology 104:1-585.]. The Scientific Monthly 72:63.