Hydrotaea chalcogaster (Wiedemann)

10. Hydrotaea chalcogaster (Wiedemann) View in CoL

Anthomyia chalcogaster Wiedemann, 1824:52 . Lectotype male, Batavia [= Jakarta], Java, ZMUC, des. Pont (1973a: 242).

Ophyra chalcogaster ; Sabrosky, 1949: 431.

Hydrotaea chalcogaster View in CoL ; Pont, 1989: 676.

Diagnosis. Body colour metallic black, abdomen uniformly metallic black with no evident marks; posterior margin of eye straight; female with the crossed setae on frontal vitta closer to each other than to eye margin; antenna and arista dark, anterior katepisternal seta developed; notopleuron with ground setulae; fore tarsomeres white ventrally, especially in male; wing entirely covered with microtrichia; male aedeagus with praegonite with 2 setae. Male terminalia as in Figs 116, 123, 127 and 131 and female ovipositor as in Figs 136 and 137, all in Pont (1973a).

Material examined. BMNH: Vanuatu: Ambrym: 22.vi.1925, 2 ♂ , P.A. Buxton. Banks: Vanua Lava , x.1929, 1 ♀, L.E. Cheesman; xi,1929, 1 ♀; Santa Maria, Gaua, Nombur , 8.x.1922, 1 ♂, T.T. Barnard; 15.x.1922, 1 ♂. Éfaté: Port Vila , i.1974, 1 ♂, N.L.H. Krauss; 10.xii.1922, 1 ♀, T.T. Barnard. Erromango: viii.1930, 1 ♂ , L.E. Cheesman; Dillon Bay , ii.1981, 6 ♂, N.L.H. Krauss. Espiritu Santo: viii–ix.1929, 1 ♂ , L.E. Cheesman; Big Bay , 1.viii.1925, 2 ♂, P.A. Buxton. Malekula: 14.vi.1925, 1 ♂, 1 ♀ , P.A. Buxton; i.1930, 1 ♂, L.E. Cheesman; iv.1930, 1 ♂; v.1930, 1 ♂; xii.1929, 2 ♀; Malua Bay , vi.1929, 1 ♂, L.E. Cheesman; Ounua , iii–iv.1929, 1 ♀, L.E. Cheesman; ii.1929, 1 ♀; NE, v.1929, 1 ♂, L.E. Cheesman; vi.1929, 2 ♂.

BPBM: Vanuatu: Ambrym: 22–28.viii.1967, 3 ♂; 26.viii.1967, 1 ♂, J. & M. Sedlacek . Aneytioum: Anelgaohat , 0–200 m, xi.1978, 4 ♂, N.L.H. Krauss . Banks: Vanua Lava, Sola , 5–11.viii.1958, 3 ♂, B. Malkin . Éfaté: 8 km W Forari (Radier), 175–220 m, 21–23.viii.1979, 1 ♂, G.M. Nishida; 40 km NE Port Vila, 4.viii.1967, 3 ♂, light trap, J. & M. Sedlacek; Port Vila, viii.1950, 3 ♂; ii.1959, 3 ♂; 0–100 m, ii.1970, 4 ♂ ( MNRJ), 5 ♀; i.1976, 3 ♂, 2 ♀; iii.1970, 2 ♂, 1 ♀, N.L.H. Krauss; 0–200 m, ii.1973, 4 ♂, 3 ♀, N.L.H. Krauss; NW, Limestone Plateau N. of Maat, 100 m, 20.viii.1957, 1 ♂, 2 ♀, J.L. Gressitt; Klem Butte, 150–200 m, 5.xii.1978, 1 ♂, N.L.H. Krauss; Havannah Harbour, 0–50 m, 19.i.1973, 1 ♂, N.L.H. Krauss; Malafao Plateau, 100–200 m, 19.iii.1970, 1 ♂, N.L.H. Krauss; Sivivi, 50–150 m, 27.ii.1970, 1 ♂, N.L.H. Krauss; Port Vila , 17.xi.1925, 1 ♂, W.H. Ford . Epi: Lowekewou, 0–100 m, 31.viii.1979, 2 ♂, W.C. Gagné, G.M. Nishida, G.A. Samuelson; Vaemali, 11–18.viii.1967, 11 ♂, 1 ♀, J. & M. Sedlacek; Lamen Bay , 0–20 m, 3.ii.1976, 3 ♂, 1 ♀, N.L.H. Krauss; Vlave, 2.vii.1967, 2 ♂; 2.viii.1967, 1 ♂, J. & M. Sedlacek . Erromango: Dillon Bay , 0–100 m, iii.1978, 2 ♂; i.1984, 2 ♂, N.H.L. Krauss . Espiritu Santo: Narango , 90 m, vii.1960, 1 ♂, W.W. Brandt; SW, Tasmalum, 3 m, 4.ix.1957, 15 ♀, J.L. Gressitt . Lamen: 0–100 m, i.1976, 1 ♀, N.L.H. Krauss . Malekula: N Lakatoro, 22–30.ix.1967, 4 ♂; 23.ix–19.x.1967, 1 ♂, J. & M. Sedlacek . Pentecost: 200–500 m, 27.iii.1964, 1 ♂, R. Straatman . Tanna: Lenakel, 0–100 m, iii.1970, 3 ♂; 0–150 m, i.1977, 1 ♂, N.L.H. Krauss; Port Resolution , 0–100 m, 6.iii.1970, 2 ♂; 0–200 m, i.1977, 1 ♂, 2 ♀, N.L.H. Krauss; Yerou, 200–300 m, 8.iii.1970, 1 ♂, N.L.H. Krauss .

Comments. This species was first recorded from Vanuatu (as Ophyra chalcogaster ) by Sabrosky (1949). Pont (1973a) redescribed the species (also as Ophyra chalcogaster ).

Distribution. Australia (NSW, NT, Qld), Belau, Bonin Is, French Polynesia ( Marquesas, Society Is), Guam, Hawai‘ian Is, Indonesia ( Irian Jaya, Maluku), Marshall Is, Micronesia, New Caledonia ( New Caledonia), Northern Marianas, PNG (Bismarck Arch, PNG), Rennell I., Solomon Is, Samoa, Vanuatu, Volcano Is; Neotropical, Afrotropical, Oriental and Australasian Regions.