Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Plain Pug (Eupithecia simpliciata) is a moth of the family Geometridae. It is found in the Palearctic ecozone. The wingspan is 21 23 mm. The moth flies from May to September depending on the location. The larvae feed on Atriplex, Chenopodium, Artemisia maritima and Artemisia vulgaris. 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.