- Melanoplus flabellifer Scudder, 1878: 68.
Holotype; male; 0e0baba2-0e5f-47fe-88c4-7194466ac64f; deposited at: Academy of Natural Sciences of Philadelphia (ANSP); United States: Colorado: Park: South Park
- Melanoplus variolosus Scudder, 1878: 67-68.
Holotype; male; d59066f2-e172-4d19-b7e2-54accbd48183; deposited at: Academy of Natural Sciences of Philadelphia (ANSP); United States: Kansas: Kearny: Lakin
- Melanoplus occidentalis (Thomas, 1872) in Bruner, 1893: 28.
- Melanoplus variolosus Scudder, 1878 (synonym of Caloptenus [sic] occidentalis Thomas, 1872) in Scudder, 1897: 145.
- Melanoplus flabellifer Scudder, 1878 in Scudder & Cockerell, 1902: 43.
- Melanoplus occidentalis (Thomas, 1872) in Caudell, 1903: 803.
- Melanoplus brevipennis Bruner, 1904: 65.
- Melanoplus flabellifer Scudder, 1878 in Rehn & Hebard, 1906: 405.
- Melanoplus occidentalis (Thomas, 1872) in Rehn & Hebard, 1906: 404.
- Melanoplus flabellifer Scudder, 1878 in Bruner, 1908: 318.
- Melanoplus flabellifer Scudder, 1878 in Rehn & Hebard, 1908: 395.
- Melanoplus brevipennis Bruner, 1904 in Rehn & Hebard, 1912: 124.
- Melanoplus brevipennis Bruner, 1904 (synonym of Caloptenus [sic] occidentalis Thomas, 1872) in Hebard, 1918: 163.
- Melanoplus flabellifer Scudder, 1878 (synonym of Caloptenus [sic] occidentalis Thomas, 1872) in Hebard, 1918: 163.
- Melanoplus flabellifer Scudder, 1878 (synonym of Caloptenus [sic] occidentalis Thomas, 1872) in Buckell, 1924: 11.
- Melanoplus flabellifer Scudder, 1878 (synonym of Caloptenus [sic] occidentalis Thomas, 1872) in Hebard, 1925
- Melanoplus occidentalis (Thomas, 1872) in Hebard, 1927: 8.
- Melanoplus flabellifer Scudder, 1878 (synonym of Caloptenus [sic] occidentalis Thomas, 1872) in Hebard, 1928: 277.
- Melanoplus occidentalis occidentalis (Thomas, 1872) in Hebard, 1928: 277.
- Melanoplus occidentalis occidentalis (Thomas, 1872) in Hebard, 1929: 386.
- Melanoplus flabellifer Scudder, 1878 (synonym of Caloptenus [sic] occidentalis Thomas, 1872) in Hebard, 1935: 304.
- Melanoplus occidentalis occidentalis (Thomas, 1872) in Hebard, 1935: 304.
- Melanoplus occidentalis occidentalis (Thomas, 1872) in Slifer, 1943: 227.
- Melanoplus occidentalis occidentalis (Thomas, 1872) in Tinkham, 1948: 617.
- Melanoplus occidentalis occidentalis (Thomas, 1872) in Brooks, 1958: 29.
- Melanoplus brevipennis Bruner, 1904 (synonym of Caloptenus [sic] occidentalis Thomas, 1872) in Vickery & Kevan, 1986: 424.
- Melanoplus flabellifer Scudder, 1878 (synonym of Caloptenus [sic] occidentalis Thomas, 1872) in Vickery & Kevan, 1986: 424.
- Melanoplus variolosus Scudder, 1878 (synonym of Caloptenus [sic] occidentalis Thomas, 1872) in Vickery & Kevan, 1986: 424.
- Melanoplus occidentalis occidentalis (Thomas, 1872) in Vickery & Kevan, 1986: 424.