Subgenus Tachyura

Tachyura (Tachyura) ceylanica (Nietner, 1858)

Andrewes (1919a) lists a junior synonym of this species Tachys flavicula Motschulsky, 1859 as occurring in Hong Kong. This is the smallest species of this genus in Hong Kong. Andrewes (1925 & 1935), Saha et al. (1992) and Kopecky (2003) list this wide ranging species for Hong Kong. Specimens determined from Andrewes (1925). Material: 1 ex. W.T.L., 23.iv.12; 1 ex. W.T.L., 22.viii.14; 1 ex. W.T.L., 18.ix.14; 1 ex. W.T.L., 28.ix.14; 1 ex. W.T., September 2011; 1 ex. W.T.L., 4.x.11; 1 ex. W.T.L., 25.x.14; 3 exx. W.T.L., October 2010; 1 ex. W.T.L., 9.xi.14; 1 ex. W.T., 30.xi.14; 1 ex. W.T.L., November 2011. Biology: Imago found April to November. Attracted to light.

Tachyura (Tachyura) gongyla (Andrewes, 1925)

Andrewes (1925) described this species from Hong Kong specimens collected by Dr. M Cameron and J.J. Walker. Kirschenhofer (1986a) listed this species for Hong Kong from 2 specimens collected 29th February 1928 by Eigin Suenson; also listed for Hong Kong by Jedlièka (1965b), Hua (2002) and Kopecky (2003). Specimens determined from Andrewes (1925). Material: 1 ex. Hong Kong, Ng Tung Chai, 19.i. 13 in wet moss; 1 ex. W.T.L., 8.iv.14; 1 ex. W.T., 13.iv.13; 1 ex. W.T.L., 15.iv.07; 1 ex. W.T., April 2011; 1 ex. W.T.L., 12.v.15; 1 ex. W.T.L., 25.v.15; 2 exx. W.T.L., 17.vii.15; 1 ex. W.T.L., 20.viii.13; 2 exx. W.T.L., 21.ix.11; 1 ex. W.T.L., 1.x.14; 1 ex. W.T.L., 22.x.14; 1 ex. 27.xii.12 Hong Kong, Wu Kau Tang. Biology: Imago probably throughout the year. Can be attracted to light.

Tachyura (Tachyura) fuscula (Schaum, 1860)

This tiny species is much darker and slightly larger than T. ceylanica (Nietner, 1858) . Schaum described this species from a specimen collected by Bowring in Hong Kong. It is also listed by Gemminger & Harold (1868), Putzeys (1875), Andrewes (1925), Jedlièka (1965b), Hua (2002) and Kopecky (2003) as occurring in Hong Kong. Specimens determined from Andrewes (1925). Material: 1 ex. Hong Kong, Lantau, Pui O, 12.iv.15, in mud at edge of Buffalo Wallah. Biology: Imago found April in mud.

Many beetles possibly belonging to this subgenus could not be identified to species, but probably represents at least four species.