Solis, D.R.; Rossi, M.L.; Fox, E.G.P.; de Lima Nogueira, N.; Tanaka, F.A.O.; Bueno, O.C. 2012. On the morphology of the digestive system of two Monomorium ant species. Journal of Insect Science 13:1-13. PDF

Notes: Digestive system larva adult Monomorium.

Somfai, E. 1959. Hangya alkatúak Formicoidea. Magyarország Allatvilága 43:1-79.
Sonan, J. 1940. M. Yanagihara's collection from Daito-Islands, Okinawa: Hymenoptera. Transactions of the Natural History Society of Formosa 30:369-375. PDF

Notes: Formicidae p. 375.

Sonnenburg, H. 2005. Die Ameisenfauna (Hymenoptera: Formicidae) Niedersachsens und Bremens. Braunschweiger Naturkundliche Schriften 7:377-441.
Sonobe, R. 1973. Ant fauna of the Sesoko Island, Okinawa. Sesoko Marine Science Laboratory Technical Report 2:15-16.
Sonobe, R. 1977a. Ant fauna of Miyagi Prefecture, Japan. Japanese Journal of Ecology 27:111-116.