Photo by Drees. Nymphs are clear when young, growing darker until they are black with spines along the edges of their bodies.
Adults mate and disperse.
Over a period of several weeks, female lace bugs lay smooth, white eggs in the tissue of the underside of leaves, often along a large leaf vein. Nymphs of all stages can occur together because of the extended egg laying period of the female. Two or more generations are produced per year, with periods of high nymphal numbers occurring from March through May and from July through September. Eggs deposited in leaves from September through October hatch the following spring. Nymphal and adult stages of the lace bug occur on the underside of leaves.