Glasshouse whitefly
Portrait of glasshouse whitefly, made with magnification 12 and f/5.6 using a Canon 7D, a Canon macro lens MP-E 65mm/f2.8, a Canon 2x teleconverter and a Soligor 1.4 teleconverter.
Trialeurodes vaporariorum, commonly known as the glasshouse or greenhouse whitefly inhabits the world’s temperate regions. It is a primary insect pest of many fruit, vegetable and ornamental crops, frequently being found in glasshouses and other protected horticultural environments. Adults are 1-2 mm in length, with yellowish bodies and four wax-coated wings held near parallel to the leaf surface (source: Wikipedia).