1852. Giebel. Deutschland’s Petrefacten. p. 644. 8vo. Leipzig.
Catalogues the three butterflies described by Heer from Radoboj.
1854. Westwood. Contributions to Fossil Entomology. Quart. Journ. Geol. Soc. Lond., X, 378-96, pl. 14-18.
Represents on pl. 17, fig. 17, and pl. 18, fig. 27, two fragments of wings, which he considers as belonging to butterflies, and to which, on pp. 395-6, in the explanation of the plates, he gives the names of Cyllonium Boisduvalianum and C. Hewitsonianum.
1854. Pictet. Traite de Palæontologie, II, pp. 392-393, pl. 40. 8vo. Paris.
Gives a brief account of the fossil butterflies then known, and reproduces excellently the figures of Neorinopis sepulta, and Mylothrites Pluto given by Boisduval and Heer.
1856. Giebel. Fauna der Vorwelt, II. pp. 185-7. 8vo. Leipzig.
Gives a similar but fuller account of the butterflies described by Heer and a brief notice of others.
1856. Giebel. Geologische Uebersicht der vorweltlichen Insekten. Zeitschr. gesammt. Naturw., VIII, pp. 174-188.
Gives lists of Lepidoptera summarized from his previous work.