PHOCKEDINGS OF THE CALIFORNIA ACADEMY OF SCIENCES Fourth Series Vol. XI, No. 15, pp. 197-344, 54 text figs. December 14, 1921 XV. AN ANNOTATED LIST OF THE DIPTERA (FLIES) OF OREGON BY F. R. COLE Associate Curator in Dipterology, California Academy of Sciences AND A. L. LOVETT Oregon Agricultural College INTRODUCTION. In the preparation of this list we have endeavored to get a representative collection of diptera from the state of Oregon, but we have had little or no opportunity to col-lect in some of the faunal areas. Collectors in the state will at least have something to work from and we hope to see the list greatly increased in the near future. Cosmopoli-tan species have been listed without giving any particular data. Considering the great area of the state and the diversity of ecological conditions, our list seems quite small and it is intended only as a preliminary report. Aldrich's Catalogue lists only 89 species of diptera from Oregon, but we must add to this number about 40 species having a general dis-tribution and at least six species mentioned as occurring all along the Pacific coast. Of Aldrich's 89 species, we have been unable to find 24; seven of these are species described by Loew, five are Bigot's species, and six are species described by Williston. One hundred and seventy-eight species in this list have been described since the publication December 14, 1921
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