Smith, M. R. 1942b. The males of two North American cerapachyine ants. Proceedings of the Entomological Society of Washington 44:62-64. PDF
Smith, M. R. 1942c. The legionary ants of the United States belonging to Eciton subgenus Neivamyrmex Borgmeier. American Midland Naturalist 27:537-590. PDF
Smith, M. R. 1942d. The relationship of ants and other organisms to certain scale insects on coffee in Puerto Rico. Journal of Agriculture of the University of Puerto Rico 26:21-27. PDF
Smith, M. R. 1943a ("1942"). A new North American Solenopsis (Diplorhoptrum) (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 45:209-211. PDF
Smith, M. R. 1943b. Ants of the genus Tetramorium in the United States with the description of a new species. Proceedings of the Entomological Society of Washington 45:1-5. PDF
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