A. S.  Packard, ?Larvae of Anophtalmus and Adelops?, The american naturalist, vol. 8, pp. 562-563., 1874.

A. S.  Packard, ?The cave beetles of Kentucky?, The american naturalist, vol. 10, pp. 282-287., 1876.

A. S.  Packard, ?The cave fauna of north america with remarks on the anatomy of the brain and origin of the blind species?, Memoirs of the national Academy of Sciences, vol. 4, pp. 3-156., 1888.