Simulium (Simulium) chungi Takaoka & Huang 2006

Simulium (Simulium) chungi Takaoka & Huang, 2006

Simulium (Simulium) chungi Takaoka & Huang, 2006: 219 –227 (Female, male, pupa and larva).

Specimens examined. Two males (with their associated pupal exuviae and cocoons) in 80% ethanol, reared from pupae collected from Yunei River (24°47'26.3" N, 121°22'30.6" E), Yisheng Village, Fuxing District, Taoyuang City, Taiwan, 30-IX-2013, by Y.- T. Huang.

Remarks. This species was described from Taiwan (Takaoka and Huang, 2006) and recorded from Vietnam based on adult females attracted to a human (Takaoka et al., 2014). It is placed in the S. chungi species-group (Takaoka, 2017).

Two males of S. chungi show the following intraspecific variations (characters in the original description in parentheses): body length 2.7–2.8 mm (2.5–2.6 mm); upper-eye large facets in 18 vertical columns and 18 horizontal rows (in 19 or 20 vertical columns and 19 or 20 horizontal rows); antenna almost yellowish except the apical half of flagellomere 9 light brown in one male, or yellow except the apical three flagellomeres light brown in another male (dark brown except the scape, pedicel and the base of the first flagellomere pale), and first flagellomere elongate, 1.8 times as long as second one (1.5–1.6 times); mid femur and tibia entirely yellow (yellow except the apical cap light brown); fore basitarsus 5.5–5.9 times as long as its greatest width (6.1 times); and hind basitarsus 4.4 times as long as its greatest width (4.1 times).