Protarsi of Horologion A H. hubbardi male holotype, dorsal aspect B H. hubbardi female paratype, dorsal aspect C H. speokoites male holotype, dorsal aspect D H. hubbardi male holotype, ventral aspect E H. hubbardi male holotype, dorsal aspect. Scale bars: 0.10 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