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Asilus crabroniformis tarsuslabeled Francis Walker Insecta Britannica vol plate II page.svg en Tarsus detail of Asilus crabroniformis Linnaeus pulvilli claw empodium de Fudetail von Asilus crabroniformis Linnaeus Pulvilli Fuklaue Empodium archive org page Walker Insecta Britannica Diptera Vol plate II Francis Walker PDold Asilus