Rambur a tr s - bien vu que la r ticulation varie selon les esp ces, et que les tarses ont 2 ou 3 articles. C'est principalement sur ces caract res que MM. Curtis, Hagen et Mac Lachlan ont d membr l'ancien genre Psocus, qui lui-m me avait t s par par Fabricius des H emerotius de Linn .

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