Bactridium Quadricollis

''Bactridium'' is a genus of root-eating beetles in the family Monotomidae. There are about 18 described species in ''Bactridium''.Monotomidae Species List
at Joel Hallan’s Biology Catalog. Texas A&M University. Retrieved on 17 May 2012.

Species

These 29 species belong to the genus ''Bactridium'':

* ''Bactridium adustum
* '' Bactridium angulicolle'' Reitter, 1873 ^{i c g}
* '' Bactridium angustum'' Sharp, 1900 ^{i c g}
* '' Bactridium atratum'' Reitter, 1876
* '' Bactridium brevicolle'' Reitter, 1876
* '' Bactridium californicum'' Fall, 1917 ^{i c g}
* '' Bactridium cephalotes'' (Pascoe, 1863)
* '' Bactridium convexulum'' Casey, 1916 ^{i c g}
* '' Bactridium cubaense'' Chevrolat, 1863 ^{i c g}
* '' Bactridium curtipenne'' Casey, 1916 ^{i c g}
* '' Bactridium divisum'' Sharp, 1900 ^{i c g}
* '' Bactridium ephippiger'' (Guérin-Méneville, 1837)
* '' Bactridium ephippigerum'' (Guerin-Meneville, 1829) ^{i c g b}
* '' Bactridium erythropterum'' (Melsheimer, 1844) ^{i c g b}
* ''Bactridium exiguum
* ''Bactridium flohri
* ''Bactridium fryi