4 CRNUiAi. roNmnrRATioNii. 



unlike thr prrfiTt tn!t«*ct n* jow-iihlo ; f<>r wh«t mti Ik* tnorr unlikr ih.in ihf rntrqiillar and 

 liultrrfly ^ ll<>w di^iLotiiiK tho one, at It rmwN like a rrpUlc ; and h<>w U-uullful thr 

 uthrr, on II flili In ihr air like n hlrd ! 



From the reK. Ihr llrnt <talr In whirh the inject appcan In tho larra. This Rta^ of 

 .-xiitriirr i* rh«nui«Tiz«-<l l«v thr \<Tiiiir<irni nlini»r and r«in>trurtl">n of thrlr Imdim ; and 

 It U a «l«u«' whIrh nttrnrts our attontinn nior»' fn-fiurntly than that of the jH-rft-ct lni>wt, 

 anil It l"< i>no in whirh it iisimily rouimit* n Rroati-r iini>'nnt <>f injury than in th*- i»rrfiTt 

 stB(^ : It ii, l<»i, In thit «tai;«' that ihi- nj^rii-ultiirist ran nion- flTrrtunily f\t*nninntr th«-!<* 

 hisf'ie*. The trrm /<irr<i i< appliiil (;«*n<T;illy to the iinniatun- l»utt«rfly or rat'-qiillar (inil>s 

 •IT white, •tftft ImmIIi-iI .ininiiiN, whirh nn- Imntaturr U-etien ; while matrKotN are Immaturr 

 Hit's, «>r Ih'Ikiir to the diptmus onler of Ins^fts. All, however, are the analogoiu rr- 

 prrsentntlvesof the different ortlent in the same staf^e of development, or that sta«e during 

 whirh the ins««rt rmws and rnHpienlly casts Its Intef^imenls : It devours immen'X' quanti- 

 ties of fiMMl. and is ofti-n very th'stnirlive to the fulia^e of vegetable. When it has reached 

 its development for the larva stage, it ceases to eat, wraps itself in a mantle, simulate* 

 death, hut is n-Hlly undert^ojni; ititernal chniiees pn-paratory to a higher stnse of develop- 

 ment. In its munlle it m-ts its old skin, which it pn'>««'S down Into tlie lower p;irt of its 

 < nvelojM*. and sihui ap|M>ar> in a livery jx-culiar to the pupa stai?e. The time <iurini? which 

 it Is confined to th"N vlape varies with everj- inse«-t : in S4.nie it isl>rief ; in others, it is long. 



Insi-cts are ci)mi>os«'<l of thirte<n s«'(jments, including the head ; but an ol)scurity often 

 arises fr>m the consolidation of s«»gments, and often pnnluct-s thereby a di.sproportionatG 

 development of certain jxirts. The thnn" s<'gmonts immediately l>ehind the hea«l corrpspond 

 to the prothorar, mfsot/w,nj^,aiu\ wr/n/Aornj-of the insect ; an<l these Inar the three pair of 

 lei^, prividinl the larva |x.ss<>sses legs. Thes«' are i>ersistent,iin<l hence are calh-*! trut Itfft, 

 Id distiniruioh them from the abdominal Irt^s, prolrsfs or props, which )ir»' caducous, or are 

 uover fniusinitlixl to the ix-rlect ins<>ct : they are jxH-idiar to the larva. Tlie mouth-pieces 

 ■ >r oral organs fnHjueiilly differ in the different stages als*>. These are sometimes designed 

 for suction in the larva, while the jMTfect ins<>ct is ppividi-*! with jaws for ma.stication ; 

 hence, in such rH.'i»-'^, the nature of the f<K»d is chang<'<l : in other cases the provisions for 

 taking food are the same in Kith stages. 



The larvw grow rapidly, as a general fact, insomuch that the whole structure of the 

 nnimal indirates provisions subs«'rvient to this result : they are provided with stning and 

 "fBcient organs of mnnducatioii ; their digestive organs are very large and cajvicious ; the 

 function of digestion is mpidly effrrted. and the consumption of food is Immense in pro- 

 portion tn the Wfight of the \mh\\. It is staU-d that llcsh Ail's increas«« two hundre*! times 

 their weiglit in tweuty four hours. Count D.hmkii.o n-marks that the weight of the silk- 

 worm, when fir>t hntchcfj, is ulwmt one hundredth of a grain, or it ro^uires one hundr*-*! 

 of them to wtinh a grain : after the first mi>ulting, one hundred weigh 1ft grains; after 

 the wennd. the same numlM>r weigh 94 grains ; after the third, their w^eight Is 400 grains ; 



