Tenebroides occidentalis, Fall, 1910

Kippenhan, Michael G., 2022, The Bark-Gnawing Beetles of Montana, USA (Coleoptera: Trogossitidae, Peltidae, and Lophocateridae), Including New Substantial Distributional Records for Tenebroides collaris (Sturm), The Coleopterists Bulletin 76 (4), pp. 569-576 : 574

TeNeBROIDeS OccIDeNtALIS Fall, 1910

This species is morphologically very similar to T. corticalis and series of both species are often needed to distinguish the two. It is distributed in western Canada and the United States southward into Mexico ( Barron 1971), and is probably more widespread in Montana than the scattered records indicate. Nineteen of 35 specimens were collected by either vane traps or Lindgren funnels; two were from blacklights, and six specimens from Carter County were “collected on dead and/or fungusy ponderosa pine” .

County Records ( Fig. 2G ): Carter (13), Fergus (2), Golden Valley (5), Granite (1), Lewis and Clark (3), Liberty (1), Madison (1), Missoula (1), Musselshell (1), Powder River (1), Prairie (1), Rosebud (1), Sanders (3), Treasure (1).

Figures

Fig. 2. Distribution of 12 species of bark-gnawing beetles by county in Montana.A) Calitys scabra, B) Corticotomus caviceps, C) Temnoscheila chlorodia, D) Tenebroides collaris, E) Tenebroides corticalis, F) Tenebroides crassicornis, G) Tenebroides occidentalis, H) Tenebroides sinuatus, I) Peltis fraterna, J) Peltis pippingskoeldi, K) Peltis septentrionalis, L) Eronyxa angusta.