Helius Lepeletier & Serville, 1828

Podenas, Sigitas, Byun, Hye-Woo & Kim, Sam-Kyu, 2015, Limoniinae crane flies (Diptera: Limoniidae) new to Korea, Journal of Species Research 4 (2), pp. 61-96 : 78

Key to Korean species of the genus Helius Lepeletier & Serville, 1828

1. Wing cord surrounded by distinctly darkened area······

················ Helius (Helius) gracillimus Alexander, 1938

- Wing cord surrounded by indistinct darkening at most, usually not darkened ·················································· 2

2. Thorax gray. Radial sector (Rs) straight ······················· ················· Helius (Helius) polionotus Alexander, 1938

- Thorax light brown or yellowish. Radial sector (Rs) angulated or arched at base ········································ 3

3. Radial sector (Rs) angulated and short­spured at base, cross­vein r­m less than its own length beyond branching point of Rs. Gonocoxite of male genitalia with extra lobes on dorsal surface············································ ············ Helius (Helius) obliteratus ( Alexander, 1920b)

- Radial sector (Rs) arched at base, cross­vein r­m far beyond branching point of Rs ( Fig. 6D ). Gonocoxite of male genitalia simple, without extra lobes on dorsal surface ( Fig. 6E ) ··························································· ············ Helius (Helius) nipponensis ( Alexander, 1913)

Figures

Fig. 6. Helius. A­C. H. nawaianus. A. wing, B. basal flagellomeres. C. outer gonostylus of male genitalia. D­F. H. nipponensis. D. wing. E. male genitalia, dorsal view. F. ovipositor, lateral view.