Simulium (Simulium) rufibasis Brunetti, 1911

Simulium rufibasis Brunetti: 1911: 282–288 (Female)

Simulium (Simulium) rufibasis Brunetti: Puri, 1932a: 899 –903 (Female, male and pupa).

Specimens examined. One pharate female, collected from a slow-flowing forest stream (width 10–20 cm, depth 5– 30 cm, water temperature 14.0˚C, shaded, altitude 1,273 m, 16˚11’42.061” N/107˚51’27.955” E), Bach Ma National Park, Phu Loc, Thua Thien Hue Province, central Vietnam, 23-II-2014, by H. Takaoka, M. Sofian-Azirun & Z. Ya’cob; one female, reared from a pupa collected from a small shallow stream (width 3–6 m, depth 10–20 cm, bottom sandy, water temperature 20.0˚C, exposed to the sun, altitude 1,440 m) (12˚08’32.409” N/108˚38’58.318” E), slowly flowing in open land, Da Chais, Lac Duong, Lam Dong Province, southern Vietnam, 24-IV-2014, H. Takaoka, M. Sofian-Azirun, Z. Ya’cob, C.D. Chen & K.W. Lau; one male, reared from a pupa collected from a small stream (width 0.5–0.8 m, depth 2–7 cm, water temperature 15.0˚C, exposed to the sun, altitude 1,772 m) (12˚06’06.888”N/108˚22’02.797”E) slowly flowing in open land, 50 km from Dalat, Dinh Kno, Lac Duong, Lam Dong Province, southern Vietnam, 24-IV-2014, by H. Takaoka, M. Sofian-Azirun, Z. Ya’cob, C.D. Chen & K.W. Lau.

Distribution. India, China, Japan, Korea, Myanmar, Nepal, Pakistan, Taiwan, Thailand and Vietnam.

Remarks. This species was originally described from India (Brunetti 1911) and is assigned to the S. tuberosum species-group (Adler and Crosskey 2014). The female is characterized by the unpatterned scutum and submedian paired clusters of long hairs on the ventral surface of abdominal segment 7 (Puri 1932a). This species was recorded from Vietnam by Takaoka et al. (2014b).