Annual report . 3 O bfl ftO ,Q <n PLATE 13 Midge galls A rather stout type of gall on Salix produced by Rhabdo- phaga triticoides WalshThe more usual type ofR. triticoides Walsh gall with a few leaves attached to the stem 240 Plate 13

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902