1882. ] REY. 0. P. CAMBRIDGE ON NEW ARANEIDEA. 431 
The Jabium is short, not half the length of the maxilla, about as 
broad as long, and rounded at the apex. 
The sternum is long, and of a triangular form. 
The abdomen is large and of a quadrate form, being blunt-angular 
in front, behind, and on each side; the posterior extremity projects 
beyond the spinners, which (looked at in profile) form another some- 
what angular prominence ; the anterior portion projects greatly over 
the cephalothorax. The colour of the abdomen is yellow, generally 
appearing to fade to a somewhat clayey colour; on the upperside 
is a broad, more or less broken, longitudinal central white band, with 
some lateral blotches or patches of the same colour. The lateral and 
posterior angles are boldly tipped with black, and five brownish or 
black marks along the middle indicate the normal impressed spots. 
The male is smaller than the female, and the abdomen is of a 
narrower form, the lateral angles being scarcely noticeable; but in 
colours and markings the sexes-are similar. The palpi are short, the 
radial and cubital joints particularly so; the digital joint is large, 
and has its extremities on the inner side considerably produced in a 
pointed form and somewhat bent; the convex sides of the digital 
joints (as is not unusual in some allied genera) are directed inwards 
towards each other. The palpal organs are tolerably compact but 
complex, and, though less developed, not much unlike those of C. 
albomaculata. 
Numerous examples of this pretty Spider, but nearly all females, 
were contained in collections sent to me some years ago by Mr. G. 
H. K. Thwaites, from Ceylon. The genus is evidently nearly allied 
to Huryopis, Menge. 
Genus Tuwarres1a, Cambr. 
THWAITESIA AFFINIS, sp. n. (Plate XXXI. fig. 8 4.) 
Adult female, length 23 lines. 
This Spider is very like Thwaitesia margaritifera, Cambr. (the type 
of the genus, found in Ceylon). The abdomen is of a similar dull lu- 
teous-yellowish hue, ornamented with numerous brilliantly shining 
white, pearly, silvery scale-like blotches; and it also has its posterior 
extremity produced upwards in a conical form, so that looked at 
sideways the abdomen is as nearly as possible an equilateral triangle. 
In the type (from Ceylon) the abdomen is much more produced. 
The legs are also rather stronger and shorter than in the type, and 
are armed with fewer distinct spines, while the hairs are stronger 
and of a more spine-like bristly nature. The colour of the legs is a 
dull orange, suffused with deep orange-brown at the far extremities 
of the tibize and metatarsi, a small portion of the base of the latter 
being also similarly suffused. 
The ocular area (or rather the space within the eyes) is raised in 
a more convex form; and the genital aperture is smaller and of a 
totally different form. 
Each tarsus (in both species) ends with a strongish, black, curved 
pectinated claw. 
A single example in Mr, Traill’s Amazon collection. 
