1882. ] REV. 0. P. CAMBRIDGE ON NEW ARANEIDEA, 439 
Family Sanrieip 4. 
Maco, g.n. 
Cephalothorax as high behind as it is long; the posterior slope 
curved inwards, but almost perpendicular ; profile of upperside of 
caput slightly convex, and sloping a little forwards. The caput is 
exceedingly large, absorbing, in fact, almost the whole cephalo- 
thorax ; looked at from above, its upper surface forms nearly a 
square; the sides also are perpendicular. Height of clypeus less 
than the diameter of the fore central eyes. 
Ocular area slightly broader than long and equal in breadth before 
and behind ; fore central pair of eyes very large, and of a dull pearl- 
grey hue; fore laterals in a line with base of fore centrals, and of 
same colour; posterior pair a little smaller than fore laterals, and as 
nearly as possible equally divided from them by the minute inter- 
mediate eye, which is placed a little inside of their straight line. 
Legs moderately long, tolerably strong, 1, 3, 2, 4; first pair much 
the strongest. Armed with spines, and with a small claw-tuft be- 
neath the terminal tarsal claws. 
Falces long, straight, divergent, and directed forwards; denticu- 
lations small ; fang of moderate length and strength. 
Mazille long, strong, straight, widened on both sides at the extre- 
mities, which are rounded. 
Latium long, about two thirds the length of the maxilla, and 
narrower at apex than base; apex rounded. ‘The direction of the 
maxillee and labium is very nearly perpendicular (or at right angles) 
to the sternum, which is small, nearly round, slightly pointed behind, 
and truncated in front ; the truncation is very gently curved, the 
convexity of the curve directed backwards. 
Abdomen small, short-oval, very convex before, and fitting up 
pretty closely to the incurved thorax. 
This new genus is characterized with great diffidence, and chiefly 
on account of the form of the cephalothorax, of which the figures 
(Plate XXXI.) give a fair representation. There is very little diffi- 
culty in determining a Spider to be of this family; but to which of the 
now numerous genera it may belong is often a very difficult point 
to decide. It is a very questionable addition to our knowledge of this 
group (which now numbers nearly 1500 species) to establish, as is 
now constantly being done, new genera often most closely allied, 
without giving a single figure either of the Spider or its generic 
characters. No description, however minute and laboured, can pos- 
sibly, in such cases, compensate for an absence of figures. The eye 
takes in at a glance distinctive ideas of relative form and proportions 
from figures, when even the most careful description by itself would 
fail to give a clear conception of them. 
MaGo INTENTA, sp. n. (Plate XXXI. fig. 14.) 
Adult male, length 24 lines. 
The cephalothoraz is deep red-brown behind and on the sides, and 
strongly suffused with blackish on the upperside of the caput (or 
Proc. Zoou. Soc.— 1882, No. XXX. 30 
