J. L.  Gressitt, ?{Coleoptera: Chrysomelidae}?, Insects of Micronesia, vol. 17, pp. 1?60, 1955.

I.  Schreiner, ?Sources of new insects established on Guam in the post World War II period?, Micronesica, vol. Suppl. 3, pp. 5?13, 1991.