[6] Amer. Journ. Sci. iii, June 1872.
[7] Amer. Journ. Sci. iii, pl. xi, f. 1, June, 1872.
[8] Amer. Journ. Sci. xix, pl. i, fig. 1, Jan., 1880.
[9] Leidy, Rep. U. S. Geol. Surv. Hayden, vol. i, p. 284.
[10] Bull. Su. Mus. Roy. S. Hist. Nat. d. Belg. i, p. 8, 1882.
[11] See Trans. Amer. Entom. Soc. xv, p. 243, for Part I.
Transcriber's Notes:
The cover image was created by the transcriber, and is in the public domain.