Beetles in Idaho

The beetles in Idaho are widespread throughout the state, with the northern part having a significant distribution. Two of the biggest beetles found in north Idaho are the ten-lined June beetle found in roses, strawberries, and potatoes and the white-spotted sawyer beetle posing a threat to pine, spruce, and fir trees. Another harmful pest reportedly spotted in at least two counties of Idaho is the Japanese beetle causing damage to crops and gardens. The bark beetle species like the western pine, pine engraver, and fir engraver have also been deemed a menace to the northern Idaho forests.

Beetles in Idaho (ID)

Largest Beetles: Ten-lined June Beetle, Ponderous Borer Beetle, Western Pine Beetle, Japanese Beetle

Smallest Beetles: Banded Elm Bark Beetle, Smaller European Elm Bark Beetle

Most Common Beetles: Ten-lined June Beetle, Japanese Beetle, Ponderous Borer Beetle, White-spotted Sawyer Beetle

Longhorn Beetles

  • Asian Long-horned Beetle (Anoplophora glabripennis)
  • Citrus Long-horned Beetle (Anoplophora chinensis)
  • Flat-faced Longhorn Beetle (Graphisurus fasciatus)
  • Ponderous Borer Beetle (Trichocnemis spiculatus)
  • White-spotted Sawyer Beetle (Monochamus scutellatus)

True Weevils

  • Banded Elm Bark Beetle (Scolytus schevyrewi)
  • Smaller European Elm Bark Beetle (Scolytus multistriatus)
  • Asian Ambrosia Beetle (Xylosandrus crassiusculus)
  • Large Shothole Borer Beetle (Scolytus mali)
  • Pine Shoot Beetle (Tomicus piniperda)
  • Western Pine Beetle (Dendroctonus brevicomis)
  • Pine Engraver Beetle (Ips pini)
  • Fir Engraver Beetle (Scolytus ventralis)
  • Douglas-fir Beetle (Dendroctonus pseudotsugae)

Leaf Beetles

  • Cucurbit Beetle (Aulacophora indica)

Jewel Beetles

Scarab Beetles

  • Japanese Beetle (Popillia japonica)
  • Ten-lined June Beetle (Polyphylla decemlineata)

Skin Beetles

  • Khapra Beetle (Trogoderma granarium)

Ladybird Beetles

Sap Beetles

Blister Beetles

  • Punctate Blister Beetle (Epicauta puncticollis)