H. A.  Pilsbry, Land Mollusca of North America north of Mexico, vol. 3. 1948, pp. 748-770.

B. A.  Branson, ?Hemphillia dromedarius, a new arionid slug from Washington?, The Nautilus, vol. 85, pp. 100-106, 1972.

W. P.  Leonard, Richart, C. H., Pearce, T. A., and Hohenlohe, P. A., ?Identification Guide to Land Snails and Slugs of Western Washington?, 2004.

R. G.  Forsyth, Land Snails of British Columbia. Victoria: Royal BC Museum, 2004, p. iv, 188 pp.

K.  Ovaska, Chichester, L., Reise, H., Leonard, W. P., and Baugh, J., ?Anatomy of the dromedary jumping-slug, Hemphillia dromedarius Branson, 1972 (Gastropoda: Stylommatophora: Arionidae), with new distributional records?, The Nautilus, vol. 116, pp. 89-94, 2002.

W. P.  Leonard, Chichester, L., Richart, C. H., and Young, T. A., ?Securicauda hermani and Carinacauda stormi, two new genera and species of slug from the Pacific Northwest of the United States (Gastropoda: Stylommatophora: Arionidae), with notes on Gliabates oregonius Webb 1959?, Zootaxa, vol. 2746, pp. 43-56, 2011.