Genus Distoleon Banks, 1910

Distoleon Banks, 1910: 42 . Type species: Distoleon verticalis Banks, 1910: 42 (original designation).

Formicaleon Banks, 1911: 16 . Type species: Myrmeleon tetragrammicum Fabricius, 1798: 205 (a new name for Formicaleo Leach, 1815 by Banks, 1911: 16). Synonymized by Banks, 1916: 210.

Salvaza Navás, 1917: 12 . Type species: Salvaza cornutus Navás, 1917: 12 (monotypy). Synonymized by Stange, 2004: 148.

Eidoleon Esben-Petersen, 1918: 15 . Type species: Myrmeleon bistrigatus Rambur, 1842: 391 (original designation). Synonymized by Markl, 1954: 237.

Feinerus Navás, 1919: 190 . Type species: Feinerus umbratus Navás, 1919: 191 (monotypy). Synonymized by Stange, 2004: 148.

Nefeirus Navás, 1926: 103 . Type species: Nefeirus maesi Navás, 1926: 104 (monotypy). Synonymized by Stange, 2004: 148.

Dolicholeon Navás, 1929: 190 . Type species: Formicaleo substigmalis Navás, 1917: 10 (original designation). Synonymized by Stange, 2004: 148.

Hyloleon Navás, 1929: 188 . Type species: Hyloleon rhodocerus Navás, 1929: 189 (original designation). Synonymized by Banks, 1939: 463.

Nasma Navás, 1930: 409 . Type species: Nasma coreana Navás, 1930: 410 (monotypy). Synonymized by Aspöck et al., 2001: 285.

Feina Navás, 1931: 263 . Type species: Feina languida Navás, 1931: 264 (monotypy). Synonymized by Stange, 2004: 148.

Vessa Navás, 1931: 265 . Type species: Vessa guttata Navás, 1931: 266 (monotypy). Synonymized by Stange, 2004: 148.

Formileo Navás, 1933: 312 . Type species: Formileo collartinus Navás, 1933: 312 (monotypy). Synonymized by Stange, 2004: 148.

Nima Navás, 1935: 53 . Type species: Nima somalica Navás, 1935: 54 (monotypy). Synonymized by Stange, 2004: 148.

Diagnosis. Distoleon is readily separated from the other genera of Nemoleontini by the presence of only one presectoral crossvein in hind wing, with forks of CuA divergent and CuP+1A not parallel to the anterior but to the posterior branch of CuA only and that even for a short distance in forewing. The femoral sensory hair is longer than the femur, and the tibial spurs that are always curved and longer than first two tarsal segments taken together (Stange 2004; Kaur et al. 2019).