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Show 1896.] SPIDERS PROM THE LOWER AMAZONS. 749 two pairs, while those of the fourth pair are even less so than the third. I should expect to find, too, that no species with characters agreeing with those of Santaremia would be found with an arboreal mode of life. The habit of burrowing in tbe earth has undoubtedly been a factor in the differentiation of various genera and of this genus also, though one must not speak too confidently in the absence of data. The feathery legs and broad spatuliform terminal joints on all four pairs of legs in Avicularia and Taplnauchenlus are obviously the outcome of an arboreal habit'. Genus HARPALOTHELE, Lenz. Under the generic name Harpalothele, M. Simon, in Hist. Nat. Ar. 1892, pp. 180, 181, distinguishes three groups corresponding to three different geographical areas. The first are those from Oceania, which will fall under the genus Ixamadus, Sim., with J. varia, L. K., as the type. The second are the African species, which fall under the genus Harpalothele, Lenz., with H. reuterl, Lenz, as the type. The third are the more numerous species from the Neotropical regions, which fall under the genus Fufius, Sim., with F. atramentarlus as the type. The last generic name I have retained in this paper for convenience' sake, and have added a brief reference to the other species of the group which have been already described from South America. Genus HARPALOTHELE, Lenz. Type. H. reuterl, Lenz, Zool. Jahrbucher, i. p. 397 (1886). Bab. Madagascar. Genus IXALUS, L. Koch. Type. /. varlus, L. K. ( o* 2; 6 14 mm., 9. 15 mm.), Ar. Austral. 1873, p. 469. Hab. Oceania. The name Ixalus, however, being preoccupied, Simon has renamed the genus Ixamadus. Genus IXAMADUS, E. Sim.2 Type. /. varlus (L. K.), E. Sim. Bull. Soc. Zool. Pr. 1887, note, 6 2 • Bab. Port Bowen, Australia. 1 S. longipes, n. sp., 9. Hab. Trinidad. Type specimen in coll. Brit. Mus. Nat. Hist. 1896. Colour. Carapace mahogany-brown, clothed with sandy-yellow hairs. Mandibles clothed with short sandy yellow hairs (no long ones as in pococki). Abdomen clothed with sandy yellow-grey hairs. Oox£e of i., ii., iii., and iv., femora of i. and ii. deep chocolate-brown underneath ; the latter clothed above and on sides with sandy-yellow hairs. Underside of tibiae i. and ii. clothed with sandy-yellow hairs, glossy. Patellae and tibiae* of legs without longitudinal Btripes. Patella and tibia i. longer than carapace (25 m m . - 2 1 mm.). Habits unknown. Carapace 21 X 1 8 m m . In Hist. Nat. Ar. 1892, p. 180, the name has been misprinted Ixamatus. |