. The wonder of life . ghgoing casting ofthe cuticle. There may be five of these moults, each markedby respiratory and other difficulties, and followed by rapidgrowth. Finally, having reached its limit of growth,the caterpillar becomes quiescent; it often surrounds itseHwith a cocoon, sometimes silken, and passes into thechrysaHs or pupa state. Serious respiratory and otherdifficulties beset the pupa; a process analogous to inflam-mation pervades it; the old structure is broken down andgroups of formative cells of an embryonic character proceedto build up the adult body on a new architectural
. The wonder of life . ghgoing casting ofthe cuticle. There may be five of these moults, each markedby respiratory and other difficulties, and followed by rapidgrowth. Finally, having reached its limit of growth,the caterpillar becomes quiescent; it often surrounds itseHwith a cocoon, sometimes silken, and passes into thechrysaHs or pupa state. Serious respiratory and otherdifficulties beset the pupa; a process analogous to inflam-mation pervades it; the old structure is broken down andgroups of formative cells of an embryonic character proceedto build up the adult body on a new architectural is changed—^mouth-parts, antennae, food-canal,,muscles, everything. New structures, such as wings andcompound eyes, make their appearance. By and by therestruggles painfully out of the imprisoning husk an ffc. ?©History ofpeaths ti^tj M!Otl>|Acherontia atropos).FVb^ a^^iiR^^The cMsfpUlar. ?^I. The pupa. ^piipilvitlf thi ihoth ert^^ lV.|The moth at rest. t Tfte mo^ flying. THE CYCLE OF LIFE 455 entirely new creature, the fully-formed moth or big facts stand out. The first is that the hfe-historyis divided into a feeding growing period and a fastingreproductive period. For the amount that adult Lepidop-tera eat is trivial, and some have mouths that do not no case among the higher insects is there any growthafter the adult form is attained. The other big fact isthe zig-zagness of the development. It proceeds for atime along a certain path; it comes to a standstill; itturns back on itself; and then it goes ahead once moreon a quite different hne. Fabre has told us many stories in regard to the hfeand habits of the large plant-bug, called Cigale, famousfor its instrumental music and infamous for the Parthianshot of noxious stuff which it dehvers on our face as it fliesaway. The old legend had it that the Cigale who sangin the sunamer was forced to borrow from the ant when thescarcity of winter came, but the facts a
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Keywords: ., bookcentury1900, booksubjectnaturalhistory, booksubjectzoology
