Spider mite eggs are round or barrel shaped as seen in this photo. (The brown spot in the photo is soil) Spider mite eggs are often found along the midvein on the underside of leaves. When they are first laid, they are transparent. They turn straw colored near the time of hatching. Eggs hatch into larvae and then two nymphal stages before becoming adults. It is important to be able to recognize eggs when scouting to assess the current population and treatment options.