Aphodius hyxos Petrovitz, 1962 was reared in the laboratory and the third-stage larva is described and illustrated. The third-stage larvae and life histories of Aphodius granarius (L.), 1767 and A. hyxos are compared. Adults of A. hyxos are active from late autumn until early spring, whereas adults of A. granarius are active chiefly from early spring to late summer. The larvae of both species may be separated by differences in the distribution of setae on the raster, the shape of the anal lobes, and the size and number of holes in the respiratory plate.