Memoirs of the National Academy of Sciences . 31, p. 202, 1870. ? The cases of a trichopterous insect have recently heen discovered hy Dr. Anton Fritsch iu the Permian beds ofBohemia. K. liohm. Gesellschaft der Wissenschafteu, November 23, 1894. The earliest Lepidopterous remains,referred to a sphinx and to Pterophorus, occur in Jurassic strata. See our figure of the maxilla of Limnephilus, fig. 4, PI. LIX (lac should be i/alea), Third Report United StatesEntomological Commission. 1883; also the much more detailed figures of K. Lucas iu his Beitriige zur Kenntniss derMnndwerkzeuge der Trichopt
Memoirs of the National Academy of Sciences . 31, p. 202, 1870. ? The cases of a trichopterous insect have recently heen discovered hy Dr. Anton Fritsch iu the Permian beds ofBohemia. K. liohm. Gesellschaft der Wissenschafteu, November 23, 1894. The earliest Lepidopterous remains,referred to a sphinx and to Pterophorus, occur in Jurassic strata. See our figure of the maxilla of Limnephilus, fig. 4, PI. LIX (lac should be i/alea), Third Report United StatesEntomological Commission. 1883; also the much more detailed figures of K. Lucas iu his Beitriige zur Kenntniss derMnndwerkzeuge der Trichoptera, 1893. 56 MEMOIIIS OF THE NATIOiSTAL ACADEMY OF SCIENCES. The conclusion seems to be with our present knowledge that the Lepidoptera, Tricboptera,and Diptera may possibly have had a common ancestry, and that it iriay be found that theLepidoptera was the tirst to be differentiated, and the Diptera the last, since they are more highlymodified. The line of descent of the metabolous orders might tentatively be thus expressed: h/menoptcra. Nzuropterariatyptera-like-forras Vlll.—ATTEMPT AT A NEW CLASSIFICATION OF THE first step toward a scientific classification of the Lepidoptera was taken by Dr. Chapmanin his suggestive paper on neglected points in the pupM of lleterocerous of the groups based on pupal characters is the following: His A. Pupa smooth ami roinnkd, externally solid, inner dissepiments flimsy. Free segments in both sexes fifth and nixtli (abdominal). Never emerges from cocoon, or progresses in any by irregular fracture. 1. Macros. Larva with hooks of ventral prolegs on inner side only. (Exposed feeders.) Sphinges, Bombyces, Noliihv, yi/cteolula-, Xoctuina, Geometra: 2. Pp-aUnU. Larva with completo circle of hooks to ventral prolegs. (Concealed feeders.) ryrales, riiijcidii; Emhirida; Cnimhkhr, (ielechida; PlutelUdiv, (Jicophorida: (Epifiniphiidii; Alucilicla.)^- • Doubtful w
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