Ragas Walker, 1837

Wahlberg, Emma, 2019, Revision and morphological analysis of the Ragadidae (Insecta, Diptera), European Journal of Taxonomy 521, pp. 1-19 : 11

Genus Ragas Walker, 1837

Figs 2 A–B, 6 A, D, F–G, 9 A

Diagnosis

The species in the genus Ragas are recognized by having spine like setae on the postgena and on the inner ventral margin of the fore trochanter, and lack costal bristles. These character stages are shared with species in the genus Zanclotus , from which they can be distinguished by having bare instead of pubescent eyes, and straight instead of recurved CuA.

Type species

Ragas unica Walker, 1837 .

Figures

Fig. 2. Habitus, lateral view. A. Ragas unica Walker, 1837, ♀, lectotype (UZIL 2629:1; photo courtesy of Rune Bygebjerg, UZIL). B. Ragas unica, 1 ♀ (NHRS). C. Dipsomyia spinifera Bezzi, 1909, ♀, holotype (MTD).

Fig. 6. Habitus, lateral view. A. Ragas unica Walker, 1837, head and fore leg (NHRS). B. Iteaphila macquarti Zetterstedt, 1838, antenna (NHRS). C. Iteaphila macquarti, head and fore leg (NHRS). D. Ragas unica, mouthparts (NHRS). E. Iteaphila macquarti, mouthparts (NHRS). F. Ragas unica, 1 ♂, genitalia, lateral (NHRS). G. Ragas unica, 1 ♂, right epandrial lobe, dorsal (NHRS). H. Iteaphila macquarti, 1 ♂, genitalia, lateral (NHRS).

Fig. 9. Right wing. A. Ragas unica Walker, 1837, drawing with terminology on characters (left) and photo (right) (NHRS). B. Dipsomyia spinifera Bezzi, 1909 (MTD). C. Hydropeza longipennae (Miller, 1923) (dark colour is from underlying board to which the wing is glued) (NZAC 04021412). D. Zanclotus dioktes Wilder, 1982 (USNM). E. Iteaphila macquarti Zetterstedt, 1838 (NHRS). F. Anthepiscopus oedalinus (Zetterstedt, 1838) (NHRS-GULI000058764). G. Hormopeza obliterata Zetterstedt, 1838 (NHRS-000061621).