Smith, M. R. 1938b. Notes on the legionary ants (Eciton, subgenus Acamatus) with a record of new specific synonymy. Proceedings of the Entomological Society of Washington 40:157-160. PDF

Smith, M. R. 1939a. A new species of North American Ponera, with an ergatandrous form (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 41:76-78. PDF

Smith, M. R. 1939b. The North American ants of the genus Harpagoxenus Forel, with the description of a new species (Hymenoptera: Formicidae). Proceedings of the Entomological Society of Washington 41:165-172. PDF

Smith, M. R. 1939c. Notes on Leptothorax (Mychothorax) hirticornis Emery, and description of a related new species (Formicidae). Proceedings of the Entomological Society of Washington 41:176-180. PDF

Smith, M. R. 1939d. A study of the subspecies of Odontomachus haematoda (L.) of the United States (Hymenoptera: Formicidae). Journal of the New York Entomological Society 47:125-130. PDF

Smith, M. R. 1939e. Ants of the genus Macromischa Roger in the United States (Hymenoptera: Formicidae). Annals of the Entomological Society of America 32:502-509. PDF

Smith, M. R. 1939f. Notes on Formica (Neoformica) moki Wheeler, with description of a new subspecies (Hymenoptera: Formicidae). Annals of the Entomological Society of America 32:581-584. PDF

Smith, M. R. 1940a. The discovery of the worker caste of an inquilinous ant, Epipheidole inquilina Wheeler. Proceedings of the Entomological Society of Washington 42:104-109. PDF

Smith, M. R. 1940b. The identity of the ant Camponotus (Myrmentoma) caryae (Fitch). Proceedings of the Entomological Society of Washington 42:137-141. PDF

Smith, M. R. 1941. Two new species of Aphaenogaster (Hymenoptera: Formicidae). Great Basin Naturalist 2:118-121. PDF

Smith, M. R. 1942a. A new, apparently parasitic ant. Proceedings of the Entomological Society of Washington 44:59-61. PDF

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