Five genera of new-world "shovel-headed" and "spoon-bill" leafhoppers (Hemiptera : Cicadellidae : Dorycephalini and Hecalini)

New-world leafhoppers with strongly flattened heads are here assigned to th ree tribes: Deltocephalini (six genera), Dorycephalini (two genera), and He calini (seven genera). Revised keys Ne presented to the new-world genera, a nd 44 new-world species of the Nearctic genera Attenuipyga Oman (Dorycephal ini) and Neohecalus Linnavuori, the Holarctic genera Hecalus Stal and Memno nia Ball, and the widespread new-world genus Spangbergiella Signoret (Hecal ini). In Dorycephalini, Attenuipyga (with subgenus Dorycara Emeljanov, stat .nov.) has nine species, including Attenuipyga (s.s.) joyceae sp.nov. from Manitoba and Dorycephalus sinuatus Beamer, 1942b = Dorycephalus minor Osbor n, 1920, syn.nov. In Hecalini, 10 species in Hecalus, 3 in Neohecalus, and 15 in Memnonia are recognized, including 20 species formerly in Parabolocra tus Fieber, plus Hecalus finnamorei sp.nov., Neohecalus magnificus sp.nov., Memnonia anthalopus sp.nov., Memnonia maia sp.nov., and Memnonia panzeri s p.nov. from the northern prairies and Memnonia leptalea sp.nov. from the Gu lf states. Parabolocratus continuus DeLong, 1938 and Parabolocratus planus Shaw, 1932 are reduced to subspecific status in Hecalus,montanus, and three names are synonymized: Parabolocratus inflatus DeLong, 1938 = Hecalus mont anus (Ball, 1900); Parabolocratus rotundus DeLong, 1938 = Hecalus major (Os born, 1915); and Parabolocratus elongatus DeLong, 1938 = Memnonia grandis ( Shaw, 1932) syn.nov.