A CITY'S TREE WORK 



493 



Tr.\ining Young Shade Trees in the Nursery, Coggshall Park, Fitchburg, Mass. 



but the question is, *Do they pay?' 'Do 

 they really do as much good as would 

 appear on the surface?' Let us con- 

 sider the question for a moment. As 

 has been explained above, the moth 

 lives only for a few days. One-half 

 of these at least are males and are 



harmless. The other half lay their eggs, 

 usually within 36 hours after hatching. 

 Most of them mate and lay their eggs 

 very close to the place where they pass 

 the pupae stage. There are exceptions 

 to this, of course, as, for instance, 

 where a strong wind is prevailing, then 



Under the Protection of the Forest Warden near Fitchburg, Mass. 



