Size: 7.7-12.5mm

Seasonality: March-early September

Distribution; Western USA and CAN

Information: may be abundantly found among and under stones along river banks, as well as rocky banks of streams and creeks in remote montane and coastal forest areas. Mostly nocturnal. Movements are very similar to that of tiger beetles.

Description: body: elongate-ovate, broad, subconvex. Dorsal colouration may vary from mixed shades of grey and greenish dull bronze, to dull reddish-brown. Head triangular, eyes large, bulging laterally. mandibles wide, tip pointed into sharp, slender point, which is slightly curved. Mandibles glossy black, base gold. Head dull grey-purple from occiput to vertex, then in centre of front; margins of face golden begining from the front ocular margin to the labrum. Dorsal surface of the head slightly rough, but no elevated nor impressed sculpturing present. lateral margins of clypeus and labrum lined with pale setae. Frontal ocular margins curve inwards towards the front of the head slightly. Scapus and pedicel bronze-purple; first and second following segments half (basal half) violet, frontal half golden, rest of antennal segments violet or dark blue with pale golden frontal tips. Antennal pubescence irregular, pale white, fine, short setae maximum of 38 fine setae per segment, not thickly occurring. Pedicel nearly bare, scapus semi-densely covered. Maxillary palps cobalt blue, long, rounded tips. Pronotum small, semi-quadrate, lateral margins strongly sinuate, as seen in the first photo. Median line shallow. Hind angles acute, front angles barely obtuse. Pronotal disk heavily micropunctate, interior surfaces of punctures golden, dorsal surface between them purple-grey or grey. Elytral area ovate, humeral angles rounded-obtuse, lateral margins rounded, apices pointed, slightly rounded, margins thin, upturned. Elytral disks dotted with micropunctures, three rows of large ovate pits, each containing a gold ring, encircling a raised grey patch. Short, raised keels connect the base and top margins of each row of pits. Another row of much smaller, more closely-spaced golden circular markings line the dorsal lateral margins of the elytra. Intervals between the large pits and the smaller macules silver-grey. Ventral faces dark silver-grey, coated in sparse, fine setae. Legs bronze, gold, and red, often appear black when wet. Femora have sparsely occurring, short, white setae on both the dorsal and ventral faces.