University of Florida has an excellent write-up about these critters.They tend to lay egg masses on the lower leaves. So if you were able to inspect a few thousand leaves…Hoping the Charlottesville downtown mall isn’t beset by these. They particularly like q. phellos. Differences between instars can often be seen in altered body proportions, colors, patterns, or changes in the number of body segments. —Wikipedia
Ethnobotanic: Native Americans used common buttonbush medicinally. Decoctions of the bark were used as washes for sore eyes, antidiarrheal agents, anti-inflammation and rheumatism medications, skin astringents, headache and fever relievers, and venereal disease remedies. The bark was also chewed to relieve toothaches. Roots were used for muscle inflammation and as blood medicines.–Wikipedia