Well S. Dow, Hesperia, Suppl. I, 1937, p. 182, No. 112, photograph E.M. 2736 J. Kirchner, I.G., II², 1059 J. Kirchner, I.G., II², 1758 S. Dow, Hesperia, Suppl. I, 1937, pp. 173-174, No. 105 B.D. Meritt, Hesperia, 33, 1964, pp. 215-216, No. 59, photograph pl. 36 S.E.G., XXI, 600