CABBAGE BUTTERFLY 



189 



cabbage larva that is parasitizefl by the ichneumon lly usually 

 dies before it transforms into a chrysalis. J' he adult ichneumon 

 fly emerges from its cocoon in a week or ten davs. It is not 



Fig. 75. Imported parasite of the eiibbiige buttertly — 

 Ap(i)itcks glomeratus 



Open eocooii, adult inseet, aTid mass of cocoons near parasitizetl larva. 



llij^ldy magnilied 



known how long it lives or how many generations occur in a 

 year. The fact that it is holding tlu' l)nttcrtly in check in some 

 localities would lead to the belief that it nuilti[)lies more 

 rapidly than its host. 



