28 



SOME Sdl III INDIAN [NSE< fS, ETC. [CHAP. in. 



Butterfly 

 imetabolic.) 



( Irasshopper 



tabolic). 



. Egg sta in to botl 



II 



1 1. Larva, wingless, a< : 



on different food from adult, 

 ing and moulting, when 

 fullgrown transforming to — 



, i oung insi cl -, act- 



i ii 

 adult, growing and moulting, 

 when lull led transforming, 



(without qui 



I.. 



feeding on same food as 

 stage II, not growing or 

 moulting but reproducing 

 and (in ease of 

 laying eggs. 



III. Pupa, quiescent, not feeding or 



growing or moulting, from 

 which emerges — 



IV. Imago or adult butterfly, winged, HI. Adult insect, winged, active, 



ire, (usuall) on 



different fond from lar\a, not 

 ling but repro- 

 ducing and (in the cas 

 female) laying eggs from which 

 the next generation commeni 

 Summary.- Four stages, each distinct Summary, rhree stages of which 

 from others. the second is compara- 



tively little distinct from 

 the third. 



Speaking generally — and only general Statements can be made 

 when speaking of all the Orders of Insects as a whole — the 

 presence or absence of a quiescent pupal stage is a (actor by which 

 all insects can be divided into two categoric-, sharply separated 

 from one another, and this division appears to be one of funda- 

 mental importance. It is. indeed, largely on this account that we 

 rejei I the " Nine-< >rder " system which mutes such diversely meta- 

 morphosic insects under the heading of " Xeuroptera " and inter- 

 polates tin' more spe< ialized Orders between the less specialized. 



[he ovum or egg caries very greatly in size, shape, ornamenta- 

 tion, .mi I method ol deposition in the different groups of insects. In 

 its simplest and probably must primitive form it may be considered 

 as a spherical, colourless, transparent object < onsisting of a smooth 

 chitinous outer shell enclosing protoplasm which is at first homo- 

 geneous. At .hi. point mi tin' shell there is. as a rule, a micros, opic 

 depression, called the micropyle or micropylar area, in which occur 

 minute canals leading into the interior of the egg b) which the 

 spermatozoa obtain access to the interior in order to unite with the 

 female element for the purpose ol fertilization. The micropylar 



