H.  Brailovsky and Barrera, E., ?Redescription of the subgenus Hygia (Eucolpura) Breddin (Hemiptera: Coreidae: Colpurini), with the description of two new species, and a key to the known species?, Proceedings of the Entomological Society of Washington, vol. 99, pp. 257-266, 1997.