1870.]| REV. 0. P. CAMBRIDGE ON THE GENUS IDIOPS. 153 
oval form, truncate before, and depressed above ; the hinder por- 
tion of the caput is very slightly raised, and the normal furrows 
and indentations are strongly marked; the furrow denoting the 
junction of the caput and thoracic segment is very deeply indented, 
and of a curved form, the curve directed backwards: the surface of 
the cephalothorax is finely, profusely, and almost wholly covered 
with minute tubercular granulations; it is otherwise destitute of 
clothing or armature. 
The eyes are normal in number and position: they are placed on 
two slightly raised or tubercular elevations ; one, immediately above 
the falces, is occupied by the two foremost eyes, the other (and 
larger one), at some distance behind the former, is occupied by the 
remaining six eyes: the two foremost eyes are about an eye’s dia- 
meter above the lower margin of the clypeus; they are the largest 
of the eight, and are very near together (less than half an eye’s 
diameter), but considerably removed from the two behind them, 
which form the second row; these are further apart than those of 
the foremost (or first) row, the four forming a narrow oblong figure, 
rather wider behind than before: the hindermost (or third) row is 
composed of four eyes, in a strongly curved transverse line, the 
curve directed backwards ; the two central eyes of this row are the 
smallest of the eight, and are further apart from each other than 
each is from the lateral eye on its side. 
Falces moderate in length and strength, prominent, and curved 
in profile; they are furnished towards their extremities, on the 
upperside, with bristly hairs, and a group of short, strong, black 
spines. ; 
Legs strong, moderate in length, which is relatively 4, 1, 2, 3, 
1 and 4 not differing much ; they are sparingly furnished with hairs 
and bristles; and a few small black spines occupy the undersides of 
tibie, tarsi, and metatarsi ; the tibize of the first pair are inordinately 
strong, enlarging gradually to their fore extremity, near which, on 
the inner side, is a strongish corneous enlargement ; close in front 
of and beyond this is another of a similar but stronger and more 
marked character, and of an abruptly bent form: each tarsus ends 
with three curved claws ; the two superior ones much the strongest, 
and pectinated at their base, the inferior one small and apparently 
destitute of pectinations. 
Palpi strong, rather long, and furnished with bristly hairs ; the 
radial is much longer than the cubital joint, and very tumid in its 
form, its hinder portion being almost globular. This joint has a 
prominence near the middle of its outer side armed with a row of 
short, strong, tooth-like black spines; the digital joint is short, 
and has a blunt-pointed prominence at its outer extremity, and 
some strong spines at its extremity on the upperside; the palpal 
organs are strong and prominent, consisting of a corneous lobe, 
elongated into a strong, bent (but not twisted) corneous apophysis, 
which diminishes in size to its extremity, where it is bifid, the lower 
limb of the bifid portion being much the longest, and curved, the 
upper one very slight, but both sharp-pointed. 
