1— Hydraena (Hydraenopsis) quadricollis Wollaston 1864

Hydraena quadricollis Wollaston 1864:89

TYPE LOCALITY: Canary Island, Tenerife, Santa Cruz (Spain) .

SYNTYPES: NHML (Berthélemy et al. 1992).

IDENTIFICATION: Berthélemy et al. (1992: 208).

DISTRIBUTION: AFR PAL–NV.

REFERENCES: Kuwert (1890); Knisch (1924); Orchymont (1927); Balfour-Browne (1951); Tonapi & Ozarkar (1969); Alfieri (1976); Kaddouri (1986); Berthélemy et al. (1992); Hansen (1998); Jäch (2004).