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  1. A New Species Of Ecuadorean Toxomerus (Diptera: Syrphidae)
    By: Gerdes, C
    Type: Article
    In: Entomological news.
    Volume: 85
    Date: 1974
    Page Range: 279--283
    Publication info: [Philadelphia]American Entomological Society,1925-
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  2. Notes On Types Of Toxomerus Diptera Syrphidae
    By: Gerdes, C
    Type: Article
    In: Entomological news.
    Volume: 86
    Date: 1975
    Page Range: 13--22
    Publication info: [Philadelphia]American Entomological Society,1925-
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  3. Thysanoptera Associated With Horseradish In Illinois
    By: Gerdes, C
    Type: Article
    In: Entomological news.
    Volume: 90
    Date: 1979
    Page Range: 236--238
    Publication info: [Philadelphia]American Entomological Society,1925-
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  4. Thysanoptera Types In Collection Of Illinois natural-History survey
    By: Gerdes, C
    Type: Article
    In: Entomological news.
    Volume: 88
    Date: 1977
    Page Range: 271--279
    Publication info: [Philadelphia]American Entomological Society,1925-
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