THE EGG. 



OHAPTEE II. 



I. The Egg. 



All insects are strictly Oviparous, and bring forth their 

 young in the form of eggs, and, though a few seem to 

 furnish an exce2)tion to this, and bear living young (as the 

 AphiduD, or Plant Lice), yet this is either during certain 

 immature changes througli which the insect passes before 

 it reaches its adult state, when again it brings forth eggs ; 

 or, as is the case in a few instances, whpn the eg^ is car- 

 ried through one or two of its subsequent changes within 

 the body of the mother. 



We might, therefore, according to their mode of birth, 

 group insects as follows : 



Ovo- l^iviparous. 



1. l^arvtparoas — 



Brought forth in the form of a 

 larva, as the {aphis) plant-louse, 

 the {.iarcopha</(() ilesh-fly, etc. 



12. Papiparous — 



Continuing in the mother dur- 

 ing the larva state, and brought 

 forth in that of a pupa — as the 

 forest-fly {/lippobosca equinia) 

 tlie sheep-louse {indap)hagus ovi- 

 nus), the bat-louse {nycterihia 

 ves2)ertllio7ils), etc. 



II. Oviparous. — Including all other Insects. 



The 9ggs of insects may be studied in regard to their 

 7)iethoih of exclusion, situation^ nu))ibers, size, figure, color 



