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Show 1896.] SPIDERS FROM THE LOWER AMAZONS. 737 Genus ACANTHOSCURRIA, Ausserer, 1871. Syn. 1842. Mygale, C. Koch, Die Arachniden, ix. p. 43, fig. 718. 1850. Scurria, C. Koch, Uebersicht, v. p. 74. Type. A. genlculata (C. K.), 6". In coll. Imp. M u s . Berlin. Hab. America. Generic Characters. Legs splnose. Patella and tibia iv. shorter, or not longer than patella and tibia i. Tibia i. of 6* armed with a single spur at apex. Anterior row of eyes more or less slightly procurved. Femora iv. clothed on inner side with thick short soft hairs, forming a velvety pad. Sternal sigilla visible-1st pair at base of labium; 2nd marginal; 3rd submarginal,- 4th remote from margin. ACANTHOSCURRIA GENICULATA (C. Koch). (Plate XXXIV. fig. 17.) o. Hab, Santarem. In coll. Brit. Mus. Nat. Hist. 1896. Length 70 mm., including base of mandibles. 2 .-Colour. Carapace mahogany-brown, clothed with short grey velvety pubescence. Clypeus fringed with yellow-pink hairs. Mandibles black, clothed with short grey hairs and long rufous-pink hairs. Abdomen black, velvety, clothed with long rufous-pink hairs; black, velvety, beneath. Sternum and coxae of legs deep black-brown. Coxse of pedipalp and labium pale red-brown; inner margins fringed with fiery-red hairs and long rufous hairs. Underside of legs black-brown, clothed with long rufous-pink hairs, the distal end of each segment fringed with cream-pink hairs. Upperside: femora black, with grey pubescence, outer side fringed with long rufous-pink hairs. Patella, tibia, and protarsus and tarsus of i., ii., hi., iv. rich black-brown; the distal end of each segment and of the femur broadly tipped with short creamy-pink hairs, forming a richly contrasting annulation. Patella and tibia i. and ii., less so of iii. and iv., marked with a pair of longitudinal rufous-pink lines of short hairs. Protarsi i., ii., hi., iv. with a short basal central rufous line. The pedipalp is similarly marked. The legs are everywhere clothed with long silky rufous-pink hairs. Carapace 26 m m . long, 24 m m . broad ; gibbous behind eyes, with a depression on either side. Central fovea small, slightly recurved. Eye-tumidus longer than broad (more so than in A. brocklehursti). Centrals a full diameter apart, nearly a diameter from the laterals; their diameter distinctly less than axis of anterior laterals. Anterior row of eyes more strongly procurved than in A. brocklehursti. Mandibles 15 m m . long. Fang short, only slightly incrassate in middle below; fang-groove armed with a single row of teeth on inner side, fringed on both margins with fiery-red hairs, thickly on outer side, more thinly on inner side. Sternum 15 m m . long, 10 m m . broad; elongate oval. Four pairs of sigilla visible : 1st at base of labial plate ; 2nd marginal; 3rd submarginal; 4th |
