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the Index to Organism Names
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Oskar Johannsen Diptera Slide-Collection The Diptera slide-collection compiled by Oskar Augustus Johannsen at Cornell University represents an important collection of imagines, many larvae and pupae from rearings, or parts there-of. There are some 1944 slides of mostly nematoceran taxa, especially Chironomidae and Sciaridae, but also preparations of Stratiomyiidae, Syrphidae, Ephydridae, and many other taxa - searchable database