. Elementary entomology . Fig. 61. Chrysalis of black swallow-tailed butterfly {Papilio polyxencs) Showing attachment of tip of abdomen to mass of silk threads which have become torn from around the stem, and the silken loop which supports the thorax. (Photograph by Weed) the time of plowing, etc., which result in the prevention or mitiT «-* gation of the pest; or a knowledge of the feeding habits may in(%. ^. cate the most promising means of attack, and successful methodO • may be determined by subsequent experiments. ^ W*

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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912