Gerris (Macrogerris) insularis (Motschulsky, 1866)

Hydrometra insularis Motschulsky, 1866: 188. LT (Kerzhner & Jansson, 1985: 36): female, Japan; ZMUM.

Gerris yasumatsui Miyamoto, 1958: 120 (syn. Kerzhner & Jansson, 1985: 36). HT: male, Japan, Hokkaido, Kushiro; KUEC.