“ 11. _Thanaos Juvenalis._ Drawn in the position of fig. 12 by J. H. Emerton (1/1); fig. 11 a, the palpus, denuded (2/1). “ 12. _Thanaos vetula._ Drawn in outline by an artist in the employ of H. Woodward, Esq., of the British Museum, and filled in by S. H. Scudder (+2/1). Incorrectly named _Thanatites Juvenalis_ on the plate. “ 13. _Carystus Lucasii._ Neuration of fore wing. Drawn by G. Willis (1/1). “ 14. _Pamphilites abdita._ Markings of the upper surface of the fore wing; drawn by S. H. Scudder (2/1). “ 15. _Pansydia Mesogramma._ Neuration and disposition of spots on the fore wing; copied from Poey, Cent. Lep. Cuba, 2e Dec. (1/1). “ 16. _Thanatites vetula._ Copied from Heyden, Palæontogr., viii, pl. i, fig. 10 (+2/1). Incorrectly named Thanatites Juvenalis on the plate. “ 17. _Pamphilites abdita._ Markings of the upper surface of fore wing; drawn by S. H. Scudder (1/1). “ 18. _The same._ Neuration and disposition of the spots on the fore wing; drawn by S. H. Scudder (2/1). “ 19. _Carystus Lucasii._ Markings of the upper surface of fore wing; drawn by G. Willis (1/1). LIST OF WOOD CUTS. Fig. 1 (p. 50). _Mylothrites Pluto._ Outlines to show the disparity in size of the two insects referred to this species by Heer; drawn by S. H. Scudder; engraved by S. S. Kilburn. “ 2 (p. 89). _Cyllonium Boisduvalianum._ Copied by photography from Westwood, Quart. Journ. Geol. Soc. Lond., x, pl. xvii, fig. 17; engraved by H. Marsh. “ 3 (p. 89). _Cyllonium Hewitsonianum._ Copied by photography from the same, pl. xviii, p. 27; engraved by H. Marsh. “ 4 (p. 90). _Palæontina oolitica._ Copied by photography from Butler, Lep. Exot., pl. xlviii, fig. 1; engraved by H. Marsh. “ 5 (p. 90). _The same._ Copied by photography from the same, fig. 2; engraved by H. Marsh. “ 6 (p. 92). _The same._ Copied by photography from Butler, Geol. Mag., [2] i, pl. xix, fig. 4; engraved by H. Marsh. “ 7 (p. 92). _The same._ Copied by photography from the same, fig. 5; engraved by H. Marsh. “ 8 (p. 94). _The same._ Drawn by S. H. Scudder; engraved by S. S. Kilburn. ERRATA. Page 19, line 4; _for_ voicé, _read_ voici. “ 29. The first three lines form a part of the quotation from Butler, and should have been but single-leaded. “ 51, note; _for_ Dareai, _read_ Danai. “ 58, line 9; _for_ before the cell, _read_ before the tip of the cell. “ 62, line 13; _for_ fig. 2, _read_ fig. 11.