The Genitalia of Male Syrphidae: Their Morphology, with Especial Reference to Its Taxonomic Significance
Published in Annals of the Entomological Society of America, in 1921, in volume 14, issue 3, pages 169-214
Date published:1921
Published in Annals of the Entomological Society of America, in 1921, in volume 14, issue 3, pages 169-214
Date published:1921