Haase first proposed the name Netrocera (Deutsche ent. Zeit. Lep. iv. 1891, p. 1) for Hesperiidae, as a division distinct from all other butterflies; Karsch replaced the name in the following year by Grypocera, because Netrocera is the name of a genus.
The literature of butterflies has become extremely extensive. The following works contain information as to general questions: 1, Scudder's Butterflies of New England, a beautifully illustrated work completed in 1889, and replete with interesting discussions. 2, Staudinger, Schatz and Röber, Exotische Tagfalter, in three folio volumes (Fürth, 1884-1887), with illustrations of exotic butterflies and a detailed sketch of their characters. 3, Enzio Reuter, "Uber die Palpen der Rhopaloceren," in Acta Soc. Sci. Fenn. xxii. 1896, treating fully of classification and phylogeny.
Journal of Entomology, i. 1862, p. 218: for early instars of South American Nymphalidae see Müller, Zool. Jahrb. Syst. i. 1886, p. 417.
This is the subject of Scudder's Life of a Butterfly, 1893.
P. Zool. Soc. London, 1883, p. 205.