Scobicia declivis

Definition

A species of horned powder-post beetle in the family Bostrichidae, native to North America and introduced to Oceania. Adults bore into dead or dying hardwoods and conifers, and are notorious for tunneling through lead-sheathed electrical cables, causing short circuits—hence the common names 'lead cable borer' and 'short-circuit beetle'. Larvae feed on wood, completing development in seasoned timber, dead branches, or utility poles.

Etymology

Latin declivis meaning 'sloping' or 'inclined', likely referring to a subtle morphological feature of the pronotum or elytra.

Example

Scobicia declivis is a significant pest of timber in service and of historical concern to power companies; in New Zealand, where it was introduced, it attacks dead standing trees and processed wood products.

Synonyms

• lead cable borer
• short-circuit beetle

Related Terms

• Bostrichidae
• powder-post beetle
• wood-boring beetle
• LeConte 1860

Usage Notes

The common names emphasize economic damage rather than biology; the beetle does not consume lead but excavates through it while seeking wood or pupal chambers. In North America it is native and rarely abundant enough to cause major timber loss, but in introduced ranges it can be more problematic. Taxonomically, Scobicia is sometimes placed in subfamily Bostrichinae or treated as incertae sedis within Bostrichidae depending on phylogenetic revision.