鳥取県の海浜性ウスバカゲロウ類の1990-1991年における分布と生息地の砂の粒度

鳥取砂丘および鳥取県中東部の海浜で1990-1991年に調査したウスバカゲロウ科の幼虫（アリジゴク）の生息記録を掲げた。巣穴形成種ではクロコウスバカゲロウの巣穴が鳥取県の海岸では広域にみつかったのに対して，ハマベウスバカゲロウは鳥取砂丘でしか確認できなかった。鳥取砂丘ではハマベウスバカゲロウはクロコウスバカゲロウよりも，より海側の開けた場所を占めており，営巣地の砂粒径も前者のほうが後者よりも大きい傾向のあることが示唆された。Records of the coastal species of antlions (Neuroptera, Myrmeleontidae) in 190-191 in Tottori Prefecture are presented. Following four species were found: Myrmeleon bore (Tjeder, 1941) and M. solers Walker, 1853 as pit makers and Heoclisis japonica (MacLachlan, 1875) and Distoleon contubernalis (MacLachlan, 1875) as non-pit makers. Myrmeleon bore was widely found from various sandy beaches in central and eastern parts of Tottori Prefecture, whereas M. solers was confined to the Tottori Sand Dunes. Pits constructed by M. bores were distributed mainly in and along the windbreak forests adjacent to the open sand dunes, while those of M. solers were found mainly on the open sand dunes close to the shore. Sand grain size tended to larger in the sites where pits of M. solers were found than those occupied by M. bore. It seemed that positional relationship of habitats of the two non-pitbuilding species, Heoclisis japonica and Distoleon contubernalis in the Tottori Sand Dunes, was similar to that of M. solers and M. bores.