Gonioctena olivacea

Size
3.7-7.5mm
Basic colour
Yellowish to brownish with black marks
Pattern colour
Elytral suture dark brown, elytra sometimes with longitudinal brown lines which may be irregular in shape or broken.
Number of spots
No spots, though note markings as above.
Pronotum
Usually yellow to brown, occasionally black.
Leg colour
Yellowish to brownish