E.  Arcaya, Diaz, D., and Marcos-Garc{\'?a, M. A., ?New aphids prey of Pseudodoros clavatus (Fabricius, 1794) (Diptera, Syrphidae) potential agent to the biological control?, Bolet{\'?n de la Asociacion española de Entomologia, vol. 28, pp. 245-249, 2004.