742 MR. F. 0. PIOKARD CAMBRIDGE ON (June 16, 
stiff, fiery-red hairs, especially the three terminal segments. Tarsi 
of all four pairs tipped with a broad bar of rufous hairs. Under- 
side of tarsi of pedipalp, tarsi and protarsi of first and second pairs 
ot legs, except extreme base of protarsi, tarsi and half the protarsi 
of third and the apex of protarsus of fourth pairs, furnished 
with a thick scopula. Tarsi of all four pairs and of pedipalp 
broad, spatuliform. Abdomen clothed on the sides with bright 
rufous, stiff and long hairs, these becoming obsolete towards the 
apex of abdomen above, disclosing an undercovering of short black 
hairs. Underside clothed with black hairs. 
Carapace longer than broad, in proportion of 20:18; flat, not 
sibbous behind eye-tumulus.  ye-tumulus twice as long as 
broad, more or less prominent (variable). Anterior centrals one 
diameter apart, distant from anterior laterals a space equal to 
transverse diameter of iatter. Anterior row only slightly pro- 
curved’. Central fovea deep, recurved. Fang-groove armed with 
a single row of short stout conical teeth, both margins fringed 
with long hairs; floor of groove studded with minute granules. 
Sternum with three pairs of sigilla visible—lst at base of Jabial 
plate, 2nd obsolete, 3rd marginal, 4th submarginal. Labiwm 
quadrate, its distal third entirely studded with minute cuspules. 
Coxa of pedipalp slightly more than twice its breadth; its inner 
basal angle studded with minute cuspules, as also is the basal 
inner disc, only more scattered; anterior inner angle produced, 
obtusely conical. Legs of fourth pair longer than those of first. 
Tarsus of pedipalp with one, of legs i., ii., ui., and iv. with two 
small stout hooked claws, their inner edges plain, not armed with 
denticles. Spinning mamille four; posterior pair trisegmental, 
second segment shortest. The whole three segments taken 
together one-third longer than width of sternum. 
This is the form which is most abundant on the Amazons, 
occurring at Para, Breves, Gurupa, Monte Alegre, Obydos, 
Santarem, &c., in almost any number and in all stages of develop- 
ment. Amongst the foliage the little yellow-legged immature of 
this species with black tarsi, the next stage with black oblique 
stripes on the abdomen, and many others, were in abundance. The 
adults constructed their tubular retreat in almost any locality which 
offered a more or less vacant cylindrical space. Of the hollow 
stumps of the Assai palm in the neighbourhood of Para, which 
had been sawn off about 3 ft. from the ground, almost every one 
‘had its tenant. Further up the river, one found them in the 
folded leaves of bananas, and at Obydos and Santarem abundant 
in the half-grown condition in the hollow centre of the pineapple 
plant. Sometimes, too, their loose white irregular cylinder of 
1 In scarcely a single specimen are the eye-measurements the same, so 
inconstant and unreliable are characters drawn from the proportional size and 
separation of these organs. In some specimens the anterior row is much more 
strongly procurved, while the anterior laterals are distant from the centrals a 
space equal to the diameter of the latter. 
