(.•ai;j;a(;k mTTKHri.\ 



\:\ 



> I 



Pupa. 



Larva. 



Parasites. 



Place some liiivu' in a cyaiiidr IxiUlc. Study and draw 

 a specinuMi. Can yon lind llic six .singk- eyes {^ocelli) on 

 the side of llic licadV Note the small feelers (fnifnivrr), and 

 tlie strong teeth (nn(n<h'/>/<!<). How many [)airs of joini.d 

 le<'"s has the tliurax ? How many nii serine nte<l Icos ( p,-nlri/s) 

 on the alKh)nieii ? Note the inind)er of segments on llic 

 al)donien, and locate, if possihlc, all the spiracles. 



Pupa. After a larva is 

 iuU-U'rown it ceases to eat 

 and becomes restless, leav- 

 ing the cabbage and crawl- 

 in u" about. When these 

 s}niptoms are seen, keep 

 a larva un<ler a glass for 

 observation. Note that it 

 spins a mat of silk into 

 which the claws of the 

 last pair of prolegs are 

 fastened, and a girdle of 

 silk over the middle of 

 its back. After it is thus 

 securely fastened it draws 

 its head down. When it 

 has remained in this posi- 

 tion for some time, the 

 skin s[)lits over the head 

 and thorax, and we hnd a <-hrysalis in placi- of the grei'n larva. 

 Draw the j)Upa as it is fastened by its girdle. Search tor 

 pupa' and make a list of places where they are found. Save 

 as many as possible in order to see the butterllies emerge. 



Adult or imago. The rapid distribution of cabbage buttertlies 

 is due to their ilight acro.ss the country from garden to garden, 

 and to th(^ conveyance of the chrysahs on cairiages and trains. 

 F(»llow the butterfly for lifteen minutes and keep a record of 



^r 



• > 



Female. 



Male. 



Fig. 78. Insect case to show bioloiry of calj- 

 bage butterfly 



