548 Mr. R. I. Pocock on some 
6'. Posterior side of coxa of palp naked throughout 
the middle of its length; anterior side of tro- 
chanter of palp with ragged, not erect and 
stiff, hairs; anterior side of coxa of first leg 
thickly clothed with erect bristly hairs. 
a>, Male with two tibial spurs ; posterior sternal 
sigilla conspicuous, remote from the margin ; 
anterior median eyes lying far in advance of 
the middle of the ocular area, owing to the ; } 
weak procurvature of the anterior line .... Tapinauchenius. 
62, Male with one tibial spur on first leg ; 
posterior sternal sigilla inconspicuous, sub- 
marginal. 
a’. Eyes as in Tapinauchenius, no tibial spur 
on second leg in male ............++-5 Pachistopelma. 
6°, Eyes of anterior line strongly procurved, 
the medians lying in the middle of the 
ocular area. 
a‘, No tibial spur on second leg in male ; 
fourth leg longer than first .......... Avicularia. 
64. A tibial spur on second leg in male ; 
fourth leg shorter than first.......... Lridopelma, 
Genus PACHISTOPELMA, nov. 
Resembling Avicularia in the presence of a single spinous 
spur on the tibia of the first leg in the male, the marginal 
position of the sternal sigilla, absence of spines, development 
of scopule on legs, &c., but differing in having the eyes of 
the anterior line only a little procurved, the centres of the 
medians lying in front of the middle of the ocular area, 
the anterior edge of the medians being well in advance of the 
posterior edge of the laterals. As in Avicularia and Tapin- 
auchenius, the posterior side of the coxa of the palp is 
naked throughout the middle of its length, the trochanter is 
clothed with long, soft, flexible hairs, and the anterior side of 
the coxa and trochanter of the first leg with simple slender 
hairs, intermixed just below the suture on the former segment 
with some delicate pin-like hairs. 
Type Pachistopelma rufonigrum, sp. n. 
Pachistopelma rufonigrum, sp. n. 
? .—Body and limbs clothed with short pale brown hairs ; 
setee on the limbs shorter than is usually the case and 
brownish ; the femora, patellee, and tibice indistinctly adorned 
with whitish bands, which are most conspicuous on the 
patelle, protarsi ornamented with a median brown stripe 
some years ago Mons. Simon recognized the identity between the types 
of Santaremia and Ephebopus. The latter was referred by Simon to his 
section ‘“ Selenocosmieze,” 
