The insect pictured is a Lace Bug. The insects in this family generally live and feed on the underside of leaves and they are active now.
Here in central PA the azalea lace bug will cause a stippling or chlorotic appearance (pictured) on azaleas (Rhododendron spp.) and pieras.
Maintaining healthy plants with proper watering, fertilizing and location selection... (when planting) will help reduce plant stress and subsequent damage potential. As with red spider mites a hard jet of water from a garden hose directed unto the undersides of the leaves can assist in the control but will probably not succeed in total eradication. Spring is the best time to control the first or second generation of lace bugs with insecticides. Insecticidal soap or horticultural oil treatments are also early in the year.