1. Untersuchungen über den männlichen Copulationsapparat der Ameisen, speciell der Formicinae;Clausen;Mitteil. Schweizer. Entomol. Ges.,1938
2. The anatomy and histology of the male reproductive of Camponotus pennsylvania DeGeer (Formicidae, Hymenoptera);Forbes;J. Morphol.,1954
3. The male reproductive system of the army ant, Eciton hamatum Fabricius;Forbes,1958
4. The anatomy and histology of the male reproductive system of the legionary ant, Neivamyrmex harrisi (Haldeman) (Hymenoptera, Formicidae);Forbes;J. N. Y. Entomol. Soc.,1965
5. Anatomy of the male reproductive systems of the adults and pupae of two doryline ants, Dorylus (Anomma) wilverthi Emery and D. (A.) nigricans Illiger;Ford;J. N. Y. Entomol. Soc.,1980