Notes on Culicoides (Diptera : Ceratopogonidae) in Niigata Prefecture, Japan

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  • 新潟県におけるヌカカの観察
  • ニイガタケン ニ オケル ヌカカ ノ カンサツ

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The work here reported concerns biting-midges collected during the period from May to October, 1956, in Niigata Prefecture, Japan. Culicoides collected are 14 species (See the list of species). C. arakawae has been widely found over the plains and the hilly regions. C. circumscriptus has been prevalent along the seashore and the area of the saline hot-springs. While, C. matsuzawai was prevalent amongst Okutadami, the mountainous district. According to our observations on C. circumscriptus at Matsunoyama-village, the larvae have been abundantly found in the slime of the gutter draining, the water which contains 3% Sod. Chl., 37°, pH 8.5-10.0 and was constantly discharging from the saline hot-spring. And the adults attack violently against human beings and their main biting activity reaches a distinct peak at dusk.

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