Montana Field Guide

C. leachellus is a moderately large Crambid (25 - 27 mm wingspan) with medium brown forewings that have a wide longitudinal silvery white discal stripe which ends before the subterminal line. This stripe lacks a tooth below and is not cut by an oblique line. The forewings have a triangularly produced apex. There is a row of five dark spots in the subterminal line. The hindwing is smoky white. The cilia of both fore and hind wings are silvery metallic. Males are similar to females (Powell and Opler, 2009).

C. leachellus adults have been collected in Alberta from August to mid September (Powell and Opler, 2009).

C. leachellus prefers grassland areas (Powell and Opler, 2009).

It is presumed that C. leachellus larvae feed on grasses (Powell and Opler, 2009).