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Phyllonorycter tritaenianella is a moth of the Gracillariidae family .. Gracillariidae. Gracillariidae. Phyllonorycter. Phyllonorycter. moth. moth. It is known from Quebec in Canada and Illinois , Kentucky , Maine , Michigan , New York , Connecticut and Massachusetts in the United States .. Quebec. Quebec. Illinois. Illinois. Kentucky. Kentucky. Maine. Maine. Michigan. Michigan. New York. New York ( state ). Connecticut. Connecticut. Massachusetts. Massachusetts. The wingspan is 7-8 mm .. wingspan. wingspan. The larvae feed on Ostrya species , including Ostrya virginiana and Ostrya virginica .. Ostrya. Ostrya. Ostrya virginiana. Ostrya virginiana. Ostrya virginica. Ostrya virginica. They mine the leaves of their host plant .. mine. leaf miner. The mine has the form of a rather large roundish blotch mine on the upperside of the leaf .. mine. leaf miner. At first the mine is a flat blotch , and the loosened epidermis is white , sparsely speckled with brown .. mine. leaf miner. Later , by contraction of the epidermis , the mine becomes roomy and tentiform and the leaf is completely folded over .. mine. leaf miner. The larva is green and of the cylindrical type , and spins a thin ovoid silken cocoon , fastened to the leaf above and below .. larva. larva