CAPE COD CRANBERRY INSECTS 



57 



The Worm. 



Tlie normal mature worm (fiji-. 43) is about half an inch lonii' and i.s green, 

 often tinged with reddish on the hack. Tiie head is yellowish, 'i he parasit- 

 ized worms seldom lieconie nuich over a third of an incli long. 



The caterjiillars are generally most active from about July 15 to about 

 August 30, Ijut usually some work in the berries well into September. When 

 through feeding, they go down to the sand under the vines, on or near the 

 surface of which they make oval cocoons (lig. W) of sand and silk or of fallen 

 cranberry leaves webbed together. Those of the normal worms generally are 

 a little over three-eighths of an inch long, but those of jiarasitized ones are 

 smaller and frailer. They are not impervious to water, for when submerged 

 they nearly fill up in about five days. The worms in them generally are not 

 much aifected liy cold water and many li\e through the winter under bog 

 flowage. 



Cranberry Fruit Worm. 



Fig. -12. Egg under cr,lyx lobp of cranberry. 



Fig. 43. Worm. Much enlarged. 



Fig. i-i. Cocoons. Somewhat enlarged. 



Fig. 45. Moth. Much enlarged. 



Much enlarged. 



