Idaea orilochia is a moth in the family Geometridae. It is found in Panama and Costa Rica. The fore- and hindwings are very pale fawn-colour, slightly irrorated with fine reddish-brown scales. The forewings have two dark brown spots on the costal margin and a small spot at the end of the cell. The hindwings are crossed by a rather wide reddish-brown band and with a reddish-brown streak at the anal angle.