334 THE NATIONAL GEOGRAPHIC MAGAZINE 



A HEDGE-ROW IN BELGIUM HEAVILY INFESTED WITH WINTER NESTS OF THE BROWN- 

 TAIL MOTH, THE SMALL BLACK DOTS SEEN ON THE BRANCHES 



This is a common condition of hedge rows and trees in Belgium. This photograph was 

 taken within a few miles of the Holland border and within easy flight of the moths to 

 certain large Dutch nurseries, which send immense quantities of stock to this country. 



WINTER (I9IO) NESTS OF THE BROWN-TAIL MOTH IN AN INFESTED DISTRICT OF 



MASSACHUSETTS 



These are easily recognizable objects and must be pruned off during winter and burned 



