 Hessian fly, Mayetiola destructor Diptera: Cecidomyiidae - 5463540Subject: Hessian fly Genus: Mayetiola Family: Cecidomyiidae Order: Diptera Class: Hexapoda including Insecta Photographer: Pest and Diseases Image Library Area: Entomology - General Entomology Image Number: 5463540 