1896. ] SPIDERS FROM 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 the 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 Tapin- 
auchenius are obviously the outcome of an arboreal habit '. 
Genus HarPaLotHete, 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 Jvamadus, Sim., with 
I. varia, L. K., as the type. The second are the African species, 
which fall under the genus Harpalothele, Lenz., with H. reuteri, 
Lenz, as the type. The third are the more numerous species from 
the Neotropical regions, which fall under the genus Fufius, Sim., 
with F. atramentarius 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 HarPanorHens, Lenz. 
Type. H. reuteri, Lenz, Zool. Jahrbiicher, i. p. 397 (1886). 
Hab. Madagascar. 
Genus Ixatus, L. Koch. 
Type. J. varius, L. K. (6 2; go 14 mm., 9 15 mm.), Ar. 
Austral. 1873, p. 469. Hab. Oceania. 
The name Jxalus, however, being preoccupied, Simon has 
renamed the genus Jvamadus. 
Genus Ixamanpvs, E. Sim.? 
Type. J. varius (L. K.), E. Sim. Bull. Soe. Zool. Fr. 1887, note, 
3 9. Hab. Port Bowen, Australia. 
1 §. longipes, nu. sp., 29. Hab. Trinidad. Type specimen in coll. Brit. Mus. 
Nat. Hist. 1896. 
Colour, Carapace mahogany-brown, clothed with sandy-yellow hairs. Man- 
dibles clothed with short sandy yellow hairs (no long ones as in pococki). 
Abdomen clothed with sandy yellow-grey hairs. Ooxe 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 tibize i. and ii. clothed 
with sandy-yellow hairs, glossy. Patelle and tibiz of legs without longitudinal 
stripes. Patella and tibia i. longer than carapace (25 mm.—21 mm.). Habits 
unknown. Carapace 21 x18 mm. 
2 In Hist. Nat, Ar. 1892, p, 180, the name has been misprinted Ixamatus. 
