POLYCESTINAE Lacordaire, 1857
  MASTOGENIINI LeConte & Horn, 1883
    MASTOGENIINA LeConte & Horn, 1883

Genus Mastogenius Solier, 1849
  Mastogenius Solier, 1849: 507.
        Type species: Mastogenius parallelus Solier
  Haplostethus LeConte, 1860: 253.
        Type species: Haplostethus subcyaneus LeConte
arizonicus Bellamy 2002b:2, 8 - Arizona
castlei Champlain & Knull 1922: 145 - Florida
     syn. antennatus Cazier 1952: 6
crenulatus Knull 1934: 334 (ssp. subcyaneus) - Alabama, Florida, Georgia, Louisiana, Missouri, New Jersey, North Carolina,
                                                                            Ohio, Pennsylvania, Tennessee, Texas
    syn. knulli Obenberger 1939: 79
puncticollis Schaeffer 1919: 213 - Arizona
robustus Schaeffer 1905: 148 - Arizona
subcyaneus (LeConte) 1860: 254 (Haplostethus) - Delaware, Mississippi, Missouri, Pennsylvania
texanus Bellamy 2002b:4, 8 - Texas

Genus Trigonogya Schaeffer, 1919
  Trigonogya Schaeffer, 1919: 213.
        Type-species: Mastogenius reticulaticollis Schaeffer
reticulaticollis (Schaeffer) 1904: 210 (Mastogenius) - Texas

Genus Micrasta Kerremans, 1893
  Micrasta Kerremans, 1893: 115.
        Type-species: Micrasta typica Kerremans
oakleyi Fisher 1935: 30 - Florida