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Show 1896.] SPIDERS FROM THE LOWER AMAZONS. 739 though the Avicularias certainly scarcely had a chance, for I usually caught them under a handkerchief or glove, when the legs could not be used in the way described above. Still it is quite possible that they also act in the same way, for the abdomen of Avicularia was in many cases entirely devoid of pubescence. Santaremia pocockll, however, had plenty of chances, but never made use of this method of defence, so far as I observed, nor were their abdomens in any case bare of pubescence. This handsome Spider is probably the Bird-eating Spider described and figured by Bates in his ' Naturalist on the Amazons,' though I found nothing save beetle relics (Longicorns chiefly) in the bottom of the hollow where A. geniculata lived. So far as I know no account of the whisking off of irritating hairs by A. geniculata or any "Mygale" has ever been published, if ever observed. There can be little doubt but that the A. geniculata here described is identical with the specimen in the Berlin Museum. This, a male, has been figured by Koch, and a male specimen in the British Museum of Natural History agrees well with the figure. The annulations on the legs are its chief characteristic. Whether Ausserer saw the type male or not, I cannot say, but he m a y have taken his descriptions from Natterer's specimen from the Bio Branco, Brazil. The female of this species is an addition to the National collection. ACANTHOSCURRIA BROCKLEHURSTI, n.sp. (Plate XXXIV. fig. 18.) ?. Hab. Para. Type in coll. Brit. Mus. Nat. Hist, 1896. Length 60 mm., including base of mandibles. 2 •-Colour. Carapace deep brown, clothed with grey-brown velvety pubescence. Margin of clypeus fringed with fine pink-tipped grey hairs. Base of mandibles thickly clothed with short grey pubescence and longer scattered rufous hairs. Abdomen clothed with deep brown velvety pubescence and long scattered rufous hairs ; ventral surface velvet-black. Sternum and coxae of legs velvety, clothed with rich chocolate-brown pubescence. Labium and coxa of pedipalp pink, clothed with long pale-orange hairs, inner margin fringed with fiery-red hairs. Underside of base of mandibles pink ; margins of fang-groove fringed with fiery-red hairs. Legs clothed entirely with rich chocolate-brown pubescence and long scattered rufous hairs, apex of each segment fringed with short cream-pink hairs. Patellae of i., ii., hi., and iv. exhibiting two longitudinal lines of short rufous hairs. Carapace 22 m m . long, 20 m m . broad ; gibbous behind eyes, with a depression on either side. Central fovea deep, transverse-procurved. Eye-tumulus a little longer than broad, oval, prominent. Anterior row of eyes almost straight, procurved ; centrals scarcely one diameter apart (a little less from laterals), their diameter distinctly greater than axis of laterals. Mandibles 13 m m . long. Fang short, incrassate about the middle. Fang-groove with a row of teeth along inner margin; both margins fringed with red hairs, outer thickly, inner thinly. Sternum |