Chlaenius (Randallius) purpuricollis Randall 1838

Relatively uncommon.

Adults have been collected in Alberta from late May to late June.

Northern Great Plains in Alberta, Saskatchewan, North Dakota, and in the dryer eastern areas of both Washington and Oregon. In Alberta, has been collected as far north as Edmonton

Adults: 8.7-9.4mm in length. Dorsal surface usually pure black, sometimes with a slight violet hue on head and pronotum. Pronotum wider at base than at apex which help to easily distinguish it from C. niger. The basal impressions of the pronotum a moderately punctate with the rest of the base being only sparsly punctate; spare punctuation on both lateral line and median line, rest of disc with only a few scattered punctures. The second interval of the elytra tends to form irregular transverse rows of two to three punctures, with rows being separated from each other by a distance of approximately half the width of the interval. Adapted from Bell 1960 and Lindroth 1963.

Little is known but presumably found and the margins of water bodies in dense vegetation. Some Alberta individuals were collected near the North Saskatchewan River.

Not known.

Predatory, omnivorous.

Chlaenius purpuricollis is a species of ground beetle in the large and diverse genus Chlaenius. It is found in the United States and Canada.