106 REV. O. P. CAMBRIDGE ON THE GENUS IDIOPs. [Feb. 10, 
of the first pair have two strong, black, tubercular, corneous promi- 
nences near their extremities on the inner side; the hinder one of 
these is by far the longest and strongest ; both are furnished with 
bristles, and at their extremities are some short, strong, blunt, black 
spines. Each tarsus ends with three claws; the two upper ones are 
conspicuous, curved, and pectinated; the lower one is small, sharply 
bent downwards, and not easy to be seen. 
Palpi long, strong, similar to the legs in colour, and remarkable 
in their structure and armature; the cubital joints are short, and 
larger at their fore than at their hinder extremities; on their outer 
sides, rather underneath, is a sort of longitudinal irregular furrow 
or suture of a pale colour, with a slight prominence near the middle ; 
the radial joints are more than double the length of the cubitals, 
curved, very strong, and tumid, especially towards their hinder ex- 
tremities ; about the middle of their outer sides is a strong, pro- 
minent, tubercular projection, obtuse at its extremity, which (toge- 
ther with the underside) is furnished with very short, strong, blunt, 
black spines; about halfway between this projection and the ex- 
tremity of the joint is another, prominent, slender, and cylindrical, 
of a paler colour than the other, and with a few, very short, tuber- 
culiform, black spines near its extremity ; the digital joint is rather 
shorter than the cubital, of an oblong form, very slightly concave 
beneath, and with its anterior extremity strongly emarginate, or 
rather produced on either side, mostly so on the inner one. The 
palpi are furnished with hairs, bristles, and spines; a group of long 
and strong bristly hairs occupies the underside of the radial joint 
near its hinder extremity ; and the fore extremity of the digital joint 
is armed with some strong black spines. The palpal organs consist of 
a long, strong, and tortuous corneous process of a red-brown colour, 
mixed with whitish; this process is somewhat bulbiform near its 
base, and terminates with a small, bluntish continuation; in a state 
of rest this organ extends backwards nearly to the hinder extremity 
of the radial joint. 
Falces moderately strong, prominent, of a red-brown colour, hairy, 
and armed with a small group of short strong spines near their 
extremities on the upperside. 
Mazille strong, cylindrical, divergent, and having the palpi issu- 
ing from their extremities; they are thickly fringed on their inner 
sides with reddish-yellow hairs. 
Labium very small, short, rather broader at its base than at its 
apex, which is rounded. 
Sternum large, oblong-oval, much narrower before than behind ; 
this part (with the labium and maxillz) is similar to the legs in 
colour; the sternum is also furnished with strong, prominent, bristly 
hairs, and four smooth, oval, reddish patches or spots form a curved 
transverse row across its centre, the curve directed backwards. 
Abdomen broad-oval, narrower before than behind; it projects 
over the base of the cephalothorax, is tolerably convex above, round, 
and abruptly terminated at its hinder extremity; it is of a deep 
dusky-brown colour, its sides and upper part strongly rugulose, the 
