180 



THE EVOLUTION TIIEOHV 



Wlu'u WO consider tlmt this 8ti'i|H' in (ho littlo oator])illi\i' 

 a eontiiuotro long, which li\os cm t.l\o ln.ri;o loa\os oi tho \'uu\ or on 

 the obliqnoly ribhod wilUnv-horli (h'pi/ohiuin hirsiilKDi), is (|uit.i> 

 without }n'otoctivo viihio, its ooouitouco at that stai;'o can only b(< 

 rojvardod as a pl\ylotio rouiinisconoo duo to (ho I'aot (hai tho anoi>s(.urs 

 of tlioso spocios of C/nvrucaiii/xi possossod lonn'ididinaJ s(.ripos in 

 the adult state, probably bocaiiso at that time (hoy livod on planls 

 among' tho j^rass, and that, la(or, when tl»o sjiooios oiianj^od thoir 



D An 



^«b,iii:ti^>lr" 



G All 



Fin. Ii6. Dovolopiuoiit- (iT l.lio i'y('-.s|iiil,N in llmciiloriiilhii-cil' llin Kl(<|>liiiiit 

 lln^vk-ninth {(.'Itinocumpit tilimnur). -■(, Slii^t' I, Miill \viilii>ul. jiinrkiug, simply 

 grooii. I!, SliiH'i' II, wit-li Hiili-dnr.sal Hli-ipo (sMV (', mili-ilm-Hiil liiui wiiiinwluil. 

 liitor, with tlio fli'Mt hint of tho nyn Npol, (^Aii) on wii^-iihimIm .| anil 5. J), nyi'- 

 spots in Stage III of tlio nitorpillni', winiuwliat fiirllior di'vi'lopoil (ilinn in li, 

 tho third stngo. F, Stage IV. (?, tlw) nntorior oyo-.spol, at l.iio Hanui xtan'o. 



habitat to plants with broad loaves which had arisiMi in (.bo moantinio, 

 oyt^-spots wi^i'o do.vc^lopcHl in addition to tiio fjrcH^n or brown protective 

 colouriiifj; which thoy i-otarinod. Thus tho niodorii (i<'\'olopniont of 

 these Hi)ots niiri-ors thoir phyletic evolution very raithl'ully; on tlio 

 two Bogmonts ttw.w wcw ronnod, IVoni pic^eos ol' tlio sub-dorsai Vwh', 

 first white spots ringed round with bhw^k, then unniistakoablo oyos 

 with pupils {(■, 1), G). This transfornuition oaii only liaAc begun in 

 tho I'airly woll-grown oa-Lorpillar, because it was only of any \iho to it; 

 but later on it was sluintod lurtlior back in the ontogc^ny, IVom the 



Digitized by Microsoft® 



