Most Gracillariinae rest with the front of the body steeply raised; Lithocolletinae and Phyllocnistinae rest with the body parallel to the surface; in Lithocolletinae often with the head lowered.
Most Gracillariinae exhibit a forward-facing body projection; Lithocolletinae and Phyllocnistinae possess bodies parallel to the surface; in Lithocolletinae, heads are frequently lowered.