Genitalia of Horologion species A H. speokoites median lobe, left lateral aspect B H. speokoites left paramere, left lateral aspect C H. speokoites median lobe, dorsal aspect D H. hubbardi median lobe, left lateral aspect E H. hubbardi left paramere, left lateral aspect F H. hubbardi median lobe, dorsal aspect G H. hubbardi right paramere, right lateral aspect H H. hubbardi female genitalia, ventral aspect A–C after Valentine (1932). Scale bar: 0.1 mm.

 
 
  Part of: Harden CW, Davidson RL, Malabad TE, Caterino MS, Maddison DR (2024) Phylogenetic systematics of the enigmatic genus Horologion Valentine, 1932 (Coleoptera, Carabidae, Trechinae, Horologionini), with description of a new species from Bath County, Virginia. Subterranean Biology 48: 1-49. https://doi.org/10.3897/subtbiol.48.114404