The planthopper genus Spartidelphax, a new segregate of Nearctic Delphacodes (Hemiptera, Delphacidae).

The new genus Spartidelphax is described to house three species removed from the polyphyletic genus Delphacodes. The members of Spartidelphax are coastal species native to eastern North America, and probably feed exclusively on cordgrass (Poaceae, Spartina Schreb.). The taxonomy and nomenclature of the included species (viz. Spartidelphaxdetectus, Spartidelphaxluteivittus, and Spartidelphaxpenedetectus) are reviewed. Spartidelphaxluteivittus is a nomen dubium, whose type material is inadequate to provide diagnostic features contrasting with Spartidelphaxdetectus and Spartidelphaxpenedetectus. Diagnoses and a key are provided for the remaining Spartidelphax.