Hirudo decora

Say, Thomas. (1824). Appendix. Part 1.- Natural History. 1. Zoology. <em>In: Keating, W.H.: Narrative of an expedition to the source of St. Peter's River, Lake Winnepeek, Lake of the woods, &c. &c. performed in the Year 1823, by order of the hon. J. C. Calhoun, under the Command of Stephen H. Long. Compiled from the notes of Major Long, Messrs. Say, Keating, and Colhoun.</em> Vol. II. 253-378.

Verrill, A. E. (1872). Descriptions of North American fresh-water Leeches [Art. XIX. Brief Contributions to Zoology from the Museum of Yale College. No. XVll.]. <em>The American journal of science and arts.</em> (series 3) 3(13): 126-139.