The black flies (Diptera: Simuliidae) of Vietnam Author Takaoka, Hiroyuki Author Sofian-Azirun, Mohd Author Ya’Cob, Zubaidah Author Chen, Chee Dhang Author Lau, Koon Weng Author Low, Van Lun Author Pham, Xuan Da Author Adler, Peter H. text Zootaxa 2017 4261 1 1 165 journal article 33106 10.5281/zenodo.571608 06d40acc-4fc2-4de6-9aab-96f3776ef44c 1175-5326 571608 C097C43E-D522-46C4-9D64-76D3CD4BAD86 Simulium ( Gomphostilbia ) confertum Takaoka & Sofian-Azirun, 2015 Simulium ( Gomphostilbia ) confertum Takaoka & Sofian-Azirun (in Takaoka et al ., 2015a ) : 7–13 (Female, male and pupa). Specimens examined. Four males, reared from pupae collected from a moderately flowing stream (width 1.0 m, depth 7 cm , bottom muddy, water temperature 13.0˚C, exposed to the sun, elevation 1,223 m , 22˚19’04.333”N/ 103˚52’04.265”E), Lao Chai , Sapa , Lao Cai Province , 21-XII-2014 , by H. Takaoka , M. Sofian-Azirun , Z. Ya’cob , C.D. Chen & K.W. Lau. Distribution . Vietnam ( Lam Dong and Lao Cai ). Remarks. This species was described from Lam Dong Province in southern Vietnam ( Takaoka et al . 2015a ). The males of this species collected from Sapa, Lao Cai Province in northern Vietnam have the subcosta with many hairs except near the apex which is bare, differing from the male from Lam Dong ( Takaoka et al . 2015a ).