Identifying the injury:
Foliage with whitish stippling, following by bronzing and chlorosis; defoliation.

Identifying the insect:
Adults are about 3 mm long, whitish in color with clear, "lacey" elytra (wings). Nymphs are often found with adults, smaller in size and with light and dark coloration – sometimes black.

Susceptible trees:
Sycamores (planes) in the genus Platanus (most common on P. occidentalis in the eastern U.S.)