THIRD ANNUAL REPORT OF STATE ENTOMOLOGIST. . 22T 



of pole yellow spots in place of the series of crimson spots of the 

 other form. 



When full-fed the caterpillars enter the earth to a depth of 

 several inches, and by their writhing and squirming motion push 

 away the earth into an ellipsoidal cavity. The caterpillar contracts- 

 and finally moults, the skin forming the pupa, in which state the 

 winter is passed; the moths appearing again the next season. 



This species is extensively preyed upon by a Tachnid fly^ 

 which deposits eggs upon the skin, these eggs later hatching into 

 maggots, which bore into the caterpillar's body, eventually result- 

 ing in its death. It is very probable that the fluxuation in the 

 numbers of moth is in large measure due to the variation in the 

 numbers of the parasites with which they have to contend. 



REMEDIES. 



The caterpillar is the only stage of this insect which is in- 

 llicir conspicuous markings, they may be easily detected on the 

 plants and killed by band. In some instanses, h'vwcve:-, they may 

 occur in large numebri-, making it more advisable to spra}'^ for them^ 

 They may be killed with arsenical sprays, amon-:^ which Pari* 

 Green and arsenate of lead may be mentioned. 



