The specimen records of this species so far been known in Japan are a male from Hachijo Island(Nov.1, 1929)and another unsexed skin(undated) from Chiba, both of which are in Momiyama's collection.Besides the above, another sight record is known from Chiba on Nov. 1, 1955 by S. Takano.In 1956, however, I was able to make the following observations and collected three females in breeding plumage in Osaka Bay.May 20: An adult female collected.Jane 3: Three observed and two adult females collected.