露尾甲（Nitidulidae），鞘翅目露尾甲科，约2,000种。常见于酸臭和发酵的植物汁（如腐烂的果实、发霉木材、真菌）的四周，故英文名意为「汁液甲虫」（Sap beetle）。

The sap beetles are a family (Niti****dae) of beetles.

They are small (2–6 mm) ovoid, usually dull-coloured beetles, with knobbed antennae. Some have red or yellow spots or bands. They feed mainly on decaying vegetable matter, over-ripe fruit, and sap. There are a few pest species.