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- ›Polyphylla decemlineata
Ten-lined June Beetle
Polyphylla decemlineata
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.
From the article Ten-lined June beetle on Wikipedia (CC BY-SA), quoted section by section
Description
They are relatively large in size, some growing to sizes as large as 1.5 inches (3 cm) or more. As in other members of this genus, the males have large distinctive antennae consisting of several lamellate plates, which they close up when threatened. The antennae are used to detect pheromones emitted by the females. The wing covers (elytra) have four long white stripes and one short stripe each. The underside of the thorax is covered with brownish hairs.
What it does
Eggs: The eggs are oval, dull, and creamy. They are about 1/16 of an inch long.
Larva: The grub can grow up to 2 inches with 3 pairs of legs, with a white body and brown head. The larval stage can last as long as 4 years.
Wikipedia: “Life cycle”
Listen
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Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
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In the stacks
Searching the stacks…
Every page naming Polyphylla decemlineata in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 84612.