S. Mahunka szerk.: Folia Entomologica Hungarica 27/1. (Budapest, 1974)
10 (9) Apical cells f-2 and f-3 of fore wings wide at base, (at discoidal cell). 11 (12) Fore tibia of males shorter than first tarsal joint. Wing of female in folded position hardly reaching end of abdomen. Radial vein of fore wing strongly undulated in apical third (Fig. 37). On hind wing only first and second endforks identifiable (Fig. 38). - Type-species: diff ormi s MACLACHLAN, 1867 (Stenophylax). All species European: difformis MACLACHLAN, 1867 (Stenophylax) (Alps, Austria, Hungary), noricanus MACLACHLAN, 1875 (Alps.). Anisogamus MACLACHLAN,1874 X 12 (11) Fore tibia of males longer than first tarsal joint. Wing of females in folded position reaching end of abdomen. 13 (14) Subcosta and radial vein of hind wing joining each other in apical third of membrane, somewhat before their end. - Type-species: infumatus MACLACHLAN, 1865 (Stenophylax). Only the type-species living in Europe (with the exception of southern regions). Hydatophylax WALLENGREN, 1891 14 (13) Subcosta and radial vein of hind wings not joining in apical third of membrane. 15 (16) Tibial spurs: 1, 2, 2. Discoidal cell of fore wing medium-sized, roughly as long as basal, undivided part of lateral branch of radial vein (Fig. 39). Hind wing relatively wide, always much wider than fore wing (Fig. 40). Endforks: 1, 2, 3, 5. Type-species: frauenfeldi BRAUER, 1857' (Enoicyla). European species: frauenfeldi BRAUER, 1857 (Enoicyla), (Austria, Italy: Naples? - after ULMER, 1907), pallescens MACLACHLAN, 1875 (Switzerland, France) Platyphylax MACLACHLAN, 1871 16 (15) Tibial spurs: 1, 3, 3, or other combinations, but never 1, 2, 3. 17 (24) Tibial spurs: 1, 3, 3. 18 (19) Lower appendages of male genital organ large, protruding^ inner margin concave. Black tooth absent on last tarsal joint of hind leg of females. - Type-species : melampus MACLACHLAN, 1876 (Halesus). European species: melampus MACLACHLAN, 1876 (Switzerland, North Italy), mucoreus HÄGEN, 1861 (Halesus) (Switzerland, Holland, France, England), nepos M ACLACHLAN, 1880 (Halesus) Central and West Europe), puncticollis PICTET, 1834 (Phryganea) Melampohylax SCHMID, 1955 19 (18) Lower appendages of male genital organ not protruding, inner margin not concave. A black tooth present, or possibly present on last tarsal joint of hind leg of female . For the species Anisogamus aequalis KLAPÁLEK, SCHMID established in 1955 a new genus, named Isogamus SCHMID.
