2 literature references for Orthoperus glaber (Leconte, 1852):

Author: Casey, Thos. L.
Year: 1900
Title: Review of the American Corylophidae, Cryptophagidae, Tritomidae and Dermestidae, with other studies
Source: Journal of the New York Entomological Society, vol. 8, no. 2
Author: Matthews, A.
Year: 1899
Title:
Source: A Monograph of the Coleopterous Families Corylophidae and Sphaeriidae