454 THE WONDER OF LIFE 



brown in colour; -**ik a. large head and a small body, with 



anterior breathing tubes, and no open mouth. After a 



few days the ]>'*;* S'?k splits and the winged gnat escapes. 



Other Jnaevi*, No life-history is more marvellous 



than that of * nth or butterfly. Out of the egg, after a 



very renvt kv4* development, there emerges a minute 



won.!:-lik ^v^^fciittr, usually active, voracious, and of 



rapid Typical!} ~, it shows a hard head with biting 



*<tit very minute antennas, and with several 



*v& in every respect as different as possible 



*- - .*i->,;;.rtTO insect's head. The body consists of 



**giuents, of which the first three bear jointed 



(, i*Tesponding to, though they do not become, 



.(eoqoilB fiiJrumHoA) HloM b^H a'Hjcad \o v'toialM ail J .^ .oil 

 .III .squq aHT .11 .ifiKiqistBO 9flT .1 .namioaqs B moil 

 }83i IB Hloni 9fiT .VI ,sni]R-i3fn9 Htom oH* rftiw'Bquq 



rrmvVi ?r -....- ,-,( ng of 



ii ! :' ? iJMSfr r- arked 



by u-apirnU.ry and other diiljt-uiu^s. -d by rapid 



growth. Finally, having reached its limit of growth, 

 the caterpillar becomes quiescent ; it often surrounds itself 

 with a cocoon, sometimes silken, and passes into the 

 chrysalis or pupa state. Serious respiratory and other 

 difficulties beset the pupa ; a process analogous to inflam- 

 mation pervades it ; the old structure is broken down and 

 groups of formative cells of an embryonic character proceed 

 to build up the adult body on a new architectural plan. 

 Everything is changed mouth-parts, antennae, food- 

 muscles, everything. ~. wad 



compound eyes, make ih< - there 



struggles painfully out husk an 



