Rhochmopterum Speiser 1910

Key to species of Rhochmopterum from the Oriental region (modified after Hardy and Drew (1996)) 1. Wing with rays in cell r 1 with white filling................................................................. 2 - Wing with rays in cell r 1 without white filling............................................................... 3 2. Abdomen predominantly brownish yellow, tergite 5 of male dull black, microtrichose on basal half, polished black apically....................................................................... Rhochmopterum tribullosum (Hering) - Abdomen predominantly yellow, tergite 5 of male polished black, without microtrichose............ R. melanurum (Bezzi) 3. Mesonotum with a broad white microtrichose band extending down middle, continuous over scutellum, abdomen yellow down middle, continuous over last tergite of male and female, broadly brown on sides.................. R. seniorwhitei (Bezzi) - Mesonotum even white to grey microtrichose, not extending to scutellum, abdomen yellow to brown not continuous over last tergite of male and female...............................................................................4 4. Wing with the dark central area reduced and confined within the r-m and dm-cu crossveins........... R. centralis (Hendel) - Wing with dark central area broad, extended beyond crossveins (Figs 6, 7, 22, 36, 38)............................... 5 5. First ray in cell r 1 vestigial or lacking; last ray in cell r 1 brown without hyaline base (Fig. 22)........... R. parvum (Hardy) - First ray in cell r 1 prominent/ well developed; second and third rays in cell r 1 brown with hyaline base (Figs 6, 7, 36, 38)... 6 6. First ray in cell r 2+3 curved, separated from third ray in cell r 1 by a distance of 2.75× the width of crossvein r-m, apical longitudinal band in cell r 4+5 strongly connected to band along vein M (Figs 1, 2, 6, 7), aculeus without apical notch (Figs 16, 16a, 17, 17a), glans of phallus broad with bifid apex (Figs 13, 13a)......... R. malaviyai Nikhil, David & Hancock sp. nov. - First ray in cell r 2+3 nearly straight, separated from third ray in cell r 1 by a distance of 1.5×−1.75× the width of crossvein r-m, apical longitudinal band in cell r 4+5 weakly connected to/separated from band along vein M (Figs 24, 25, 36, 38), aculeus with apical notch (Figs 30, 30a), glans of phallus trumpetiform (Figs 28, 28a)..................... R. venustum (de Meijere)