Argyresthia trifasciae is a moth of the family Yponomeutidae. It is found in North America, including California.
The wingspan is 7-7.5 mm. The forewings are shining white with a faint yellowish tinge, and marked with pale golden. The hindwings are pale yellow.
The larvae feed on Thuja occidentalis, as well as Juniperus and Cupressus species, including Cupressus macrocarpa.