PROCEEDINGS OF THE CALIFORNIA ACADEMY OF SCIENCES FOURTH SERIES Vol. XXVIII, No. 3 July 15, 1953 SOME NEW AND NOTEWORTHY APHIDAE FROM WESTERN AND SOUTHERN SOUTH AMERICA (Hemiptera-Homoptera) BY E. O. ESSIG Department ef Entomology and Parasitology University of California, Berkeley During the months of December, 1950, to and including April, 1951, Dr. A. E. Michelbacher and his wife, Martha, and Dr. E. S. Ross and his wife, Wilda, conducted an intensive insect-collecting expedition in Chile, in particular, and less extensively also in Argentina, Bolivia, and Peru with some minor collecting while en route by boat along the coast of Cen-tral America and Colombia. This expedition was a part of the activities of the California Academy of Sciences which institution arranged for the ocean transportation and supplied a truck for travel on land. On October 17, 1950, the party sailed from San Francisco on the Grace Line steam-.ship Santa Juana — destination: Valparaiso, Chile. Their ship stopped at various ports on the voyage and small collections were made at Buena-ventura, Colombia; Callao, Peru; and other ports. Upon arrival at Val-paraiso the party was cordially received by the veteran Chilean ento-mologist, Dr. Edwyn P. Reed, and by Dr. Raul Cortes of the Chilean Min-istry of Agriculture, who rendered the Americans invaluable hospitality, information, and assistance during their stay in Chile. Although largo collections were made of all kinds of insects, of which thousands were taken. Dr. and Mrs. Michelbacher also gave special atten-tion to collecting as many species of aphids as time and opportunity per-mitted. By much hard work they procured a sizable assemblage of species [59]
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