A list of 46 aphids or plant lice, injurious to grains, orchards and pasture in Chile, is presented. This work was undertaken to provide information regarding aphid species, their characteristics, collecting records, distribution, hosts, and natural enemies. The most important species herein reported are: Aphis craccivora Koch, A. fabae Scop. A. gossypii Glov., Aulacorthum solani (Kalt.), Brevicoryne brassicae (L.), Capitophorus elaeagni del Guer., Macrosiphum euphorbiae (Thomas), Myzus orrnatus Laing, M. persicae (Sulz.), Rhopalosiphum maidis (Fitch), and R. Ipadi (L.). Injurious species of common occurrence, are mentioned for alfalfa, artichoke, broad bean, cabbage, clover, tobacco, tomato, sunflower, corn., cucurbits, string bean, potato, rape and strawberry. Among natural enemies the most important predators are: Allograpta pulchra shan. (Syrphidae); Scymnus bicolor (Cerm.); Eriopis connexa Germ. (Coccinellidae), and Cecidomyiidae sp. The main parasites are: Aphidius matricariae Hald. (Braconidae); Diaeretiella rapae (M'lnt.); Ephedrus nitidus Gahan, and, Lysiphlebus sp. (Aphydiidae).

1 Ingeniero Agrónomo, Proyecto Entomología, Subestación Experimental La Cruz, Instituto de Investigaciones Agropecuarias