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Show 84 DR. A. GtTNTHER ON THE ZOOLOGICAL [Feb. 6, side and closely punctured. Wings fulvo-hyaline, their nervures dark ferruginous; the femora rufo-piceous, palest towards their apex; the pubescence on the thorax and legs fulvous. The apical margins of the segments of the abdomen rufo-piceous; the pubescence fulvous. Albemarle Island, Charles Island (W. E. Cookson). Of DIPTERA, Commodore Cookson collected two species in Charles Island, one being the Musca ochricornis of Wied., the other apparently new- SYRPHUS ALBOMACULATUS. Length 4 lines. The front covered with silvery tomentum, as well as the posterior margin of the head behind the eyes. The thorax of a metallic blue-green ; the scutellum rufo-piceous, with its posterior margin pale testaceous. Wings hyaline and splendidly iridescent; the nervures dark fuscous. The legs rufo-piceous, with the anterior tibiae, the base of the intermediate and posterior pair, and also the tips of the femora pale rufo-testaceous. Abdomen blackish brown, smooth and shining; at the base of the second and third segments laterally a large white isosceles-triangular macula. IX. NEUROPTERA. By R. MCLACHLAN. Only two species collected; both are Dragonflies, belonging to the subfamily Libellulina. 1. PANTALA HYMENIA. Libellula hymencea, Say, Journ. Acad. Philad. vol. viii. p. 19. Pantala hymencea, Hagen, Neurop. N. Amer. p. 142. One individual. In the ' Neuroptera of North America,' Hagen records this only from Indiana, Western Texas, and Mexico. Later on, in his " Synopsis on the Odonata of America" (Proc. Bost. Soc. Nat. Hist. vol. xviii. May 1875), he adds Illinois and Cuba as localities. In the ' Entomologist's Monthly Magazine,' vol. xi. p. 92 (September 1874), I noted that Mr. G. F. Mathew, R.N., found the species at Payta, Peru, and says of it:-" This fine species occurred along the sea-coast. I cannot imagine where the larvae fed, as there was no fresh water within many miles of Payta, and rain is almost unknown there. Just above high-water mark, in some places, there were large patches of a species of Mesembryanthemum; and these dragonflie3 were always to be found hawking above them." I possess an example from Chili. There can be little doubt that the species is migratory, though not to the same extent as its congener P. flavescens, which is found almost all over the world. 2. TRAMEA, sp. ? Three individuals. As these examples are in bad condition, and having regard for the difficulties that surround the group, I do not venture to describe them, although they possibly pertain to a new species, of large size (almost as large as Pantala hymencea), and with |