Calamochrous is een geslacht van vlinders van de familie grasmotten (Crambidae), uit de onderfamilie Pyraustinae.
Soorten C. acutellus Eversmann, 1842 C. albipunctalis Kenrick, 1907 C. aspilus Turner, 1915 C. bipunctalis Hampson, 1912 C. carnealis Swinhoe, 1895 C. chilonalis Lederer, 1863 C. ferruginalis Hampson, 1896 C. flavimarginalis Hampson, 1913 C. fulvitinctalis Hampson, 1918 C. homochroalis Swinhoe, 1907 C. medialis Caradja, 1925 C. minimalis Caradja, 1931 C. pallidalis Hampson, 1900 C. pentasaris Meyrick, 1932 C. pyraustalis Strand, 1918 C. roseobrunnea Warren, 1889 C. ruficostalis Hampson, 1896 C. sarcalis Hampson, 1908 C. simplicialis Snellen, 1899 C. sterrhalis Hampson, 1903 C. thermochra Meyrick, 1929