The female moth of the peach tree borer is dark blue with a wide orange stripe around the abdomen. She has opaque front wings and clear hind wings. The male is steel gray with yellow markings and clear wings. The male and female moths of the lesser peach tree borer have clear wings, and both are metallic blue with yellow markings. The eggs of the lesser peach tree borer are small, reddish-brown, and extremely hard.