THE GENITALIA OF MALE SYRPHIDÆ: THEIR MORPHOLOGY, WITH ESPECIAL REFERENCE TO ITS TAXONOMIC SIGNIFICANCE

Author: Metcalf C. L.  

Publisher: Entomological Society of America

ISSN: 1938-2901

Source: Annals of the Entomological Society of America, Vol.14, Iss.3, 1921-09, pp. : 169-225

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