Mallow Flea Beetle

Appearance

3.5-4.2 mm. Broadly-oval and discontinuous in outline, head and pronotum unmetallic orange, elytra dark metallic grey, blue or bluish-green, maxillary palpi dark brown or black, antennae dark from four pale basal segments, legs extensively black or dark brown. Head evenly convex and finely punctured behind convex and protruding eyes, frons with weak but distinct oblique impressions from the posterior margin of the eyes to just above the antennal insertions, antennae 11-segmented and gradually and only weakly widened towards the apex. Pronotum transverse, broadest at or just in front of the middle and slightly sinuate before sharp and almost perpendicular posterior angles, surface finely punctured throughout, latero-basal impressions strong and distinct but not joined by a transverse impression, lateral margins bordered but without a furrow towards the base. Elytra gently curved from sloping shoulders to a continuous apical margin, distinctly and usually strongly impressed either side at the base and with striae that are strongly punctured in the basal half but fade to the apex, these are often irregular of even confused on the disc and sometimes mixed with scattered larger punctures in the interstices. Hind femora greatly enlarged, all femora without a ventral tooth, tibiae smooth externally and with a single small apical spur, tarsi pseudotetramerous.