. The annals and magazine of natural history : zoology, botany, and geology . s far too much neglected, to again take up the studyof the Diptera, in which it is classic to describe an intense phago-cytosis during the metamorphosis. In the Hymenoptera the metamorphosis which has just been sketciied iscompleted by the histolysis and total disappearance (without phagocytosis) ofthe primitive Malpighian tubes and the salivary glands. In short, a burst ofectodermic activity realizes the completion of the following organs, momentarilyretarded in the larva: teguments, appendages, oesophagus, rectum (
. The annals and magazine of natural history : zoology, botany, and geology . s far too much neglected, to again take up the studyof the Diptera, in which it is classic to describe an intense phago-cytosis during the metamorphosis. In the Hymenoptera the metamorphosis which has just been sketciied iscompleted by the histolysis and total disappearance (without phagocytosis) ofthe primitive Malpighian tubes and the salivary glands. In short, a burst ofectodermic activity realizes the completion of the following organs, momentarilyretarded in the larva: teguments, appendages, oesophagus, rectum (formationof fresh Malpighian tubes), nervous system, and sense-organs. The tracheal growth is itself a manifestation of this ectodemicactivity. It is to be remarked that it corresponds with a periodduring which Bataillon has noted asphyxial respiratory troubles inBombyx mori.—Comptes JRendns, tome cxxxviii. p. 300 (1 Feb.,1904). * R. S. Breed, The Changes which occur in the Muscles of a Beetle (Bull. Mus. Comp. Zool. Harvard Coll. vol. xl. no. 7, Oct. 1903). £3 Hi i 4 ^. w 5< oin DXPiH Ph c^ THE ANNALS AND MAGAZINE OF NATURAL HISTORY. [SEVENTH SERIES.]No. 78. JUNE 1901. XLVIII.— On Mammals from Northern Angola collected byDr. W. J. Ansorge. By Oldfield Thomas. During 1903 the well-known collector Dr. W. J. Ansorge,to whom the British Museum is already indebted for seriesof specimens from British East Africa, Uganda, and Nigeriamade a collecting-trip to Northern Angola, and obtainedabout two hundred specimens belonging to forty-six speciesand of these a complete set has been acquired for the Museum. The mammalogy of Angola has hitherto remained almostentirely in the hands of the Portuguese, as represented—mostadmirably—by Prof. Barboza du Bocage in Lisbon and byM. Anchieta and other collectors in the country under con-sideration. Thanks to the enlightened generosity of many institutions, and notably the British Museum,had received specimens representing t
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