Trechicus LeConte, 1853

Aston, Paul, 2016, Catalogue and Bibliography of the Hong Kong Carabidae Latreille, 1802 (Coleoptera: Adephaga), with notes on the historic boundaries of Hong Kong as related to zoological collections, Zootaxa 4121 (3), pp. 201-257 : 241

Subgenus Trechicus LeConte, 1853

Perigona (Trechicus) nigriceps ( Dejean, 1831)

Listed as occurring in Hong Kong by Hua (2002) and Bousquet (2003f). Bates (1892) lists Perigona beccarii Putzeys, 1875 , a junior synonym of this species from Hong Kong. Material: 1 ex. W.T.L., 22.ii.09; 1 ex. W.T.L.; 2 exx. W.T.L., 5.iii.12; 1 ex. W.T.L., April 2011; 1 ex. W.T.L., 6.v.12; 1 ex. W.T.L., 7.v.12; 2 exx. W.T.L., 12.v.12; 1 ex. W.T.L., 12.v.08; 1 ex. W.T.L.,; 1 ex. W.T.L., June 2011; 1 ex. W.T.L., 8.vii.06; 1 ex. W.T.L., 8.viii.10; 1 ex. W.T.L., October 2011; 1 ex. W.T.L., 14.xi.11. Biology: Imago found February to November. Can be attracted to light, it is fully winged and capable of flight.

The genus is represented in Hong Kong by a second species, that shows chacteristics of the nominal subgenus; this species is slightly smaller than P. nigriceps with the disc of the elytra black and significantly different elytral setae and male genitalia.