6 FARMERS BULLETIN 845. 



MEANS BY WHICH THE GIPSY MOTH IS SPREAD. 



Egg clusters of the gipsy moth that are deposited on trees, lumber, 

 stone, or other products that are likely to be shipped may be carried 

 long distances and cause the establishment of new colonies of the 

 insect. Spread in this way is prevented by inspection of such prod- 

 ucts before they are shipped. Caterpillars of this insect may be 

 spread for limited distances by carriage on moving objects, such as 



FIG. 2. Different stages of the gipsy moth (Porthetria dispar): Egg mass on center of twig; female 

 moth ovipositing just below; female moth below, at left, enlarged; male moth, somewhat reduced, 

 immediately above; female moth immediately above, somewhat reduced; male moth with wings 

 folded in upper left; male chrysalis at right of this; female chrysalis again at right; larva at center. 



