Thoreau writes in his journal:
What were those insects, some winged, with short backs and say Half an inch long, others wingless and shorter, like little coils of brass wire (so marked), in dense droves together on trees and fences,—apparently harmless,—especially a week or ten days ago? . . .
What is often called poverty, but which is a simpler and truer relation to nature, gives a peculiar relish to life, just as to be kept short gives us an appetite for food . . .