Enithares biimpressa (Uhler)

Polhemus, Dan A., 2020, Nine new species of Enithares (Heteroptera: Notonectidae) from New Guinea, with distributional notes on other species and an updated world checklist, Zootaxa 4772 (1), pp. 132-182 : 173

Enithares biimpressa (Uhler)

Enithares biimpressus (Uhler) 1860: 231 .

Material examined. HONG KONG, New Territories: 2 males, 5 females, Sai Kung District, rocky stream in Ho Chung Valley , 90 m . [vic. 22°21′32′′N, 114°14′05′′E], 21 November 1985, CL 2206, D. A. & J. T. Polhemus ( USNM, BPBM) ; 1 male, 12 females, Tseun Wan District, Great Falls, Kadoorie Experimental Farm , 420 m . [vic. 22°25′34′′N, 114°07′48′′E], 23 November 1985, CL 2209, D. A. & J. T. Polhemus ( USNM) ; 1 male, 12 females, North District, stream in sandstone at Ha Miu Tin , 120 m . [vic. 22°30′02′′N, 114°15′56′′E], 23 November 1985, CL 2211, D. A. & J. T. Polhemus .

Discussion. Enithares biimpressa was described from Hong Kong, and the male genitalia of the topotypic specimens listed above match the figure in provided in Lansbury (1968), particularly in regard to the shape of the male paramere and the LABP. This species is close to E. chinensis , which has been recorded from nearby Macao ( Lansbury 1968), and the two species may eventually prove to be synonyms, although if so, then E. biimpressa is the far older name and would have priority.