Lace bugs are usually less than 5 mm long, flattened, and they have a reticulated surface, which may be lace-like in appearance. The head is hidden beneath the pronotum, which projects laterally, and the abdomen is completely hidden by the reticulated wings. All species are plant-feeders, and many are associated with ornamental trees, frequently sycamore, and shrubs in the urban environment. Several species of the large genus Corythucha, including C. cydoniae and C. ciliata, and C. morrilli, have been reported to bite people. The azalea lace bug, Stephanitis pyriodes (Fig. 8.3d), is common wherever azaleas are grown. The adults may be numerous on ornamental azaleas around buildings.

Sycamore lace bug, Corythucha ciliata (= Corythuca) Adults are about 3.7 mm long and pale white; the ventral side is light brown. Nymphs are brownish white and the body has many long spines. Adults and nymphs occur on and under loose bark of sycamore trees (Plantus occidentalis), and on ash and hickory. Eggs are deposited singly or in groups adjacent to veins on the underside of the leaf; hatching is in 7-28 days. Development from egg to adult takes about 5 weeks. Adults overwinter under the loose bark. It is distributed throughout North America, chiefly east of the Rocky Mountains. Adults have been reported to bite people.

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