Nature biographies; the lives of some every-day butterflies; moths; grasshoppers and flies . iar thing about the shape of this stage of theinsect is the large projection on the middle of the back. The pupa state lasts only about a week. Then the 16 The Viceroy Butterfly. butterfly emerges, hanging on theadjacent twig, until its wings arewalks upward toward the tip, wherhour or so, as showai inFigure 23, before tak-ing its first flight intothe new and airy worldinto which it finds itselfborn. The forsakenchrysalis still hangs —an empty tenement, per-fect in outward form,with only the cracksalon
Nature biographies; the lives of some every-day butterflies; moths; grasshoppers and flies . iar thing about the shape of this stage of theinsect is the large projection on the middle of the back. The pupa state lasts only about a week. Then the 16 The Viceroy Butterfly. butterfly emerges, hanging on theadjacent twig, until its wings arewalks upward toward the tip, wherhour or so, as showai inFigure 23, before tak-ing its first flight intothe new and airy worldinto which it finds itselfborn. The forsakenchrysalis still hangs —an empty tenement, per-fect in outward form,with only the cracksalong the front to indi-cate where the occupantescaped (Fig. 25). The butterflies thatthus appear in Augustbelong to the secondbrood of the remain upon thewing for some time, lay-ing eggs during thelater days of their lifeon the same kinds of ;food-plants that theydeveloped upon. Theseeggs hatch into littlecaterpillars, that feedupon the terminal partsof the leaves, in thesame way that theearlier bmod did. But empty chrysalis or theof full size. Then ite it is likely to rest an. Fig. 22. — The Chrysalis of the ViceroyButterfly. •7 Nature Biographies. when they are about one-third grown, they do somethingthat was not done by the preceding generation — theybuild special houses in which to spend the winter. Thisis so curious and interesting a fact in the hfe-history of the species, that I wantto quote the originalaccount of it, writtenby the late Dr. C. , for one of hisclassic reports on theInsects of Missouri: — The larvae of the au-tumnal brood, writesDr. Riley, when aboutone-fourth or one-thirdgrown, build for them-selves curious littlehouses, in which theypass the winter. Firstand foremost — withwise forethought and
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1901
