Differs from typical behrii (as represented by specimens from Mammoth Camp, Mono Co., Calif., and by Holland's figure) in the considerably larger size, the much darker color of the underside and the heavy nature of the black spotting. On both primaries and secondaries the postdiscal row of spots is much more pronounced and on secondaries the submarginal row is very heavy and the spots show a distinct tendency to inward, triangular elongation.