Raspberry Beetle – Byturus tomentosus (Wandlebury)

Length: 3.2 to 4 mm. This small beetle has a chestnut-red or golden appearance, with legs and antennae all of similar colour.
Similar Species
Byturus tormentosus and B. ochraceous are very similar but can be distinguished by careful viewing.
B. tormentosus is slightly smaller (up to 4mm) and has elytra that taper outwards slightly towards the base. It is also lighter brown. Ochraceous is a little larger (up to 5mm), a shade darker, with larger eyes and elytrathat are generally parallel-sided. The pronotal margins are also different: tormentosus has a narrow margin visible along most of the base whereas the margin in ochraceous is obscured by the central bulge of the pronotum.
Though the beetle larvae are pests for Raspberry growers, adults can be found feeding on pollen on a variety of wildflowers. The small adults often congregate within flowers, particularly composites such as Dandelion.
When to see it
May to July.
Life History
It lays its eggs on the flowers of Raspberries, Blackberries and Loganberries. When the larvae hatch they eat the developing fruit.