Melolonthidae Leach, 1817
Dichelonyx albicollis (Burmeister, 1855)
Dichelonyx backi (Kirby, 1837)
Dichelonyx canadensis (Horn, 1876)
Dichelonyx clypeata (Horn, 1876)
Dichelonyx crumbi Hatch, 1971
Dichelonyx decolorata (Fall, 1901)
Dichelonyx diluta (Fall, 1901)
Dichelonyx elongata (Fabricius, 1792)
Dichelonyx fulgida (LeConte, 1856)
Dichelonyx fuscula (LeConte, 1856)
Dichelonyx kirbyi Brown, 1946
Dichelonyx lateralis (Fall, 1901)
Dichelonyx linearis (Gyllenhall, 1817)
Dichelonyx muscula (Fall, 1901)
Dichelonyx nana (Fall, 1901)
Dichelonyx oregona (Van Dyke, 1918)
Dichelonyx pallens (LeConte, 1856)
Dichelonyx picea (Horn, 1894)
Dichelonyx pusilla (LeConte, 1856)
Dichelonyx robusta (Fall, 1901)
Dichelonyx subvittata (LeConte, 1856)
Dichelonyx sulcata (LeConte, 1856)
Dichelonyx testaceipennis (Fall, 1907)
Dichelonyx truncata (LeConte, 1856)
Dichelonyx vaga (Fall, 1901)
Dichelonyx valida (LeConte, 1856)
Dichelonyx vandykei Saylor, 1932
Dichelonyx vicina (Fall, 1901)
Dichelonyx violaceipennis (Blanchard, 1850)
