---
title: "Ten-lined June Beetle"
description: "Polyphylla decemlineata — Insetti e ragni. The ten-lined June beetle (Polyphylla decemlineata), also known as the watermelon beetle, is a scarab beetle found in the western United States and Canada."
canonical: https://animalchecklist.com/it/animal/ten-lined-june-beetle
last_updated: 2026-09-20
---

# Ten-lined June Beetle

> Polyphylla decemlineata — Insetti e ragni. The ten-lined June beetle (Polyphylla decemlineata), also known as the watermelon beetle, is a scarab beetle found in the western United States and Canada.

- Scientific name: *Polyphylla decemlineata*
- Category: `insects` (Insetti e ragni)
- Habitats: unknown
- iNaturalist observations: 10816
- Wikidata: [Q2378176](https://www.wikidata.org/wiki/Q2378176)
- iNaturalist taxon: [84612](https://www.inaturalist.org/taxa/84612)

## Names

- en: Ten-lined June Beetle

## Countries with the most observations

US (5576), CA (101), MX (73)

## Summary

The ten-lined June beetle (Polyphylla decemlineata), also known as the watermelon beetle, is a scarab beetle found in the western United States and Canada. The adults are attracted to light and feed on foliage, notably mature pine needles. They can make a hissing sound when touched or otherwise disturbed, which can resemble the hissing of a bat. This sound is made by their wings pushing down, forcing the air out between their wings and back. They can be an agricultural pest affecting a wide range of crops because their larvae feed on plant roots and can weaken or kill the plants.

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

## Photo

![Ten-lined June Beetle](https://animalchecklist.com/img/animals/ten-lined-june-beetle/medium.jpg)

Photo: Robbie Hannawacker · CC0 · inaturalist — https://www.inaturalist.org/observations/108138336

## Machine access

`GET https://animalchecklist.com/api/v1/animals/ten-lined-june-beetle?lang=it` — see [openapi.json](https://animalchecklist.com/openapi.json).