Psephenines occur in North and South America and Asia.
Air is obtained through ventral abdominal gill tufts.
An illustrated synopsis of the principal larval forms of the order Coleoptera. Length less than 3 mm, or 3 to 15 mm. Vestiture including bristles, scales, expanded or complex hairs. Ventral surfaces very lightly pigmented. Median epicranial region without longitudinal furrow.