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Show 1876.] MR. H. DRUCE ON PERUVIAN BUTTERFLIES. 205 Fig. 5. Four of the hooks as serially arranged on the proboscis : a, from external series, b, from the second, c, from the third, and d, from the innermost, respectively. Magnified 60 diameters. Fig. 6. A hook from the outermost row; showing the apex (a), base (J), bulbous projection (c), the posterior root-process or fang (d), the minute opening at its extremity (e), which by means of a narrow channel (/) communicates with the general cavity of the organ (g). The anterior fang is marked h. Magnified 355 diameters. Fig. 7. Diagram representing a vertical section of the anterior end of the neck: a, collar; b, fold of the first annulation; c, sheath of the proboscis ; d, lumen of the neck; e, cavity for lodgment of the retracted proboscis; /, longitudinal muscular layer; g, lemniscus. Fig. 8. Three eggs, showing the outer (a), middle (b), and inner envelope (c); also the yolk (d). Magnified 350 diameters. Fig. 9. Two of the eggs_ found divested of their external coverings. 5. List of the Butterflies of Peru, with Descriptions of new Species. By H E R B E R T DRUCE,F.L.S._,F.Z.S. With some Notes by E D W A R D BARTLETT. [Eeceived January 10, 1876.] (Plates XVII. & XVIII.) During the past few years Mr. Salvin and I have received several collections from Peru, principally made by Mr. Henry Whitely. I now think it advisable to draw up the following list of the species, only including those that I have been able to examine myself, and of which I am certain of the locality being correct. I hope by so doing to give some idea of the Butterfly-fauna of Peru, as well as to advance our knowledge of the geographical distribution of Butterflies. The collections from which I have made this list were formed by M r . Bartlett, M r . Henry Whitely, and M r . Pearce, iu the following localities. Mr. Bartlett collected in the eastern part of Peru ; for the exact places visited by him, see map, P.Z.S. 1873, p. 252, pl. xxv. Mr. Henry Whitely's principal collection was made in the valley of Cosnipata, situated on the eastern slope of the Andes of Caravaya, and the smaller collections at Paucartombo and Huasampilla, eastward of Cuzco, at an elevation of about 9000 to 10,000 feet; he also made a very small collection last year at Huiro, valley of Santana, north of Cuzco, at an elevation of about 4800 feet. Mr. Pearce, who travelled in Peru and Bolivia as a botanical collector for Messrs. James Veitch and Sons, the well-known Horticulturists, collected at Pozzuzo and Muna. The collections contained 494 species (18 of which I have described as new), representing 133 genera. Mr. Bartlett's collection had been picked oyer before any specimens came into our possession ; so that this list does not contain all the species collected by him. |