Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Canadian Arborvitae Leafminer or Cedar Leafminer (Argyresthia canadensis) is a moth of the Yponomeutidae family. It is found in North America.The larvae feed on Thuja occidentalis.A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth (about ten times the number of species of butterfly), with thousands of species yet to be described.