---
title: "Western Boxelder Bug"
description: "Boisea rubrolineata — Insects & spiders. Boisea rubrolineata or the western boxelder bug is identical to the eastern boxelder bug aside from having prominent red veins on its corium."
canonical: https://animalchecklist.com/animal/western-boxelder-bug
last_updated: 2026-09-20
---

# Western Boxelder Bug

> Boisea rubrolineata — Insects & spiders. Boisea rubrolineata or the western boxelder bug is identical to the eastern boxelder bug aside from having prominent red veins on its corium.

- Scientific name: *Boisea rubrolineata*
- Category: `insects` (Insects & spiders)
- Habitats: `urban` (Towns & gardens)
- iNaturalist observations: 13349
- Wikidata: [Q10432164](https://www.wikidata.org/wiki/Q10432164)
- iNaturalist taxon: [53226](https://www.inaturalist.org/taxa/53226)

## Names

- en: Western Boxelder Bug

## Countries with the most observations

US (11743), CA (639)

## Summary

Boisea rubrolineata or the western boxelder bug is identical to the eastern boxelder bug aside from having prominent red veins on its corium. It is found in western North America. Adults are 9–13 mm in length. The thorax and wings are black with red lines, and the abdomen is red. Nymphs are bright red and gray. Both nymphs and adults feed on boxelder. In fall and winter, adults might be noted migrating indoors to hibernate.

Text: Wikipedia (en), CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Boisea_rubrolineata

## Photo

![Western Boxelder Bug](https://animalchecklist.com/img/animals/western-boxelder-bug/medium.jpg)

Photo: Jesse Rorabaugh · CC0 · inaturalist — https://www.inaturalist.org/observations/5055483

## Machine access

`GET https://animalchecklist.com/api/v1/animals/western-boxelder-bug?lang=en` — see [openapi.json](https://animalchecklist.com/openapi.json).