There arc sever of ihefe classes that are important, the names of 

 which are pjclty hard to remember, so I will have them written on the 

 Ijlackboard and 3'ou may copy them in your notebooks. Here they 

 are: 



1. H}-lli('ii'0]l-tera. Having membrancms wings. This is the elas,s to which 



th(; liefs and wasps belong. 



2. Lei)-i-(l(ip-1era. Having stale wings. Here we find tlie moths and biil- 



terflies. 

 ;{. Uip-tera. Having two win,<;s, including the common house fly and 



the m(isi)nito. 

 -J. ('o-lc-()|i-tora. Sheath-winged. To this belong the beetles, such as the- 



May-))eetle, or ".June-bug," as it is sometimes called. 

 .'1. Hem-ip-tera. Half-winged. Tliese are the true bugs. The black 



sijuash-bng and the green plant lice are good e.xam- 



liles. 

 (i. Or-tllop-ti'iM. Straight-winged. To this class belong the grasshoppers 



and crickets. 

 7. >'('ii-r(i|i-tei'a. Lace-winged. Here we find the dragonflies or snake- 



feeders. 



Now I want to ask a question. Have any of you discovered in these 

 liard names any portion which is the same in all of them? Look 

 closely at the names on the board. You will see that the latter part 

 (if each name is alike. This part is from a Greek word which means 

 wings. 



There is something -with regard to the most of the insects which I 

 «ish to c-xplain to you before we be,:.iin to study them. It is this: 

 .Aio,st itiseets are Jotmd in four diffcjcut forms. The first is the egg. 

 ^Vheir the egg batches it produces a -worm-like animal or caterpillar 

 ■Hbjch rats and gro^^•s somoljmes f(U- days, sometimes for weeks some- 

 limes e\eii for moiitlis. This stage the scientists call the larva, and 

 it is ill this singe that the greater part of the insects do the most dam- 

 :i,l;c. C/yn you name some such insects? Yes — tent-caterpillars, cur- 

 I'ant-wonns and cut-«-orms are iiiseids that are most injurious at this 

 time. 



AVhen it has eaten and grown enough it lies very still for a long 

 time, often wrapping itself up in a covering called a cocoon. This is 

 the pupa or cliri/salis stage. After a\\'hile this pupa bursts open its 

 outer covering or cocoon and aiipears as a full-grown insect like the 

 butterfly, or beetle, or common house fly. This last stage is called the 

 imago. Can you name some insects that are most harmful when full 

 grown? Yes — grasshoppers and some of the beetles. 



NOTE TO TE.VCHER.~lf the children ooiild l»e shown a larg'e inimhcr 

 of s|(P(iiiicii.s of different inseds. either mounted or alive, for the iiurposcs 

 of olisoivation and ehissilication it would yreatly enhamo the value of the 



lessons. 



