1870. | REY. O. P. CAMBRIDGE ON SINAITIC SPIDERS. 821 
its upper surface, and projecting over the base of the cephalothorax ; 
its fore margin is truncate ; the rest is considerably indented, forming 
strong lobes all round, especially towards the hinder part, which is 
somewhat transversely rugulose; its colour on the upperside is 
yellow, strongly marked with a complex zigzag or dentated pattern 
of a deep brown, which it is impossible to describe accurately and 
intelligibly, though easily seen in the figure. The yellow portions 
are more or less clothed with a silky white pubescence ; the lateral 
lobes are yellow, and each is divided by a broad deep-brown band 
which runs over them from the upper- to the underside; the fore 
part of the abdomen is rather thickly furnished with short erect 
dark spiny bristles; the sides are yellow, striated with deep brown ; 
and the underside is deep black-brown with yellow blotches and 
markings; the spiracular plates are of a reddish-brown colour, 
margined before and inside with yellow. 
An adult female of this fine species, which I believe to be un- 
described, was captured by Mr. Lord inland from Massowah ; and I 
have great pleasure in naming it after its captor, by whose kindness 
I am able to describe and figure it. 
N.B.—In describing the pattern on the abdomen of this (and 
other intricately marked) species, the dark colour might be taken 
as the ground-colour; but I have above assumed the lighter colour 
to be so. 
Genus GASTERACANTHA. 
GASTERACANTHA LEPIDA, n. sp. (Plate L. fig. 2.) 
Female adult: length of abdomen 3 lines, breadth 5} exclusive of 
the spines; length of the Spider 43 lines, breadth to extremity of 
the lateral spines 8 lines. 
The cephalothoraz is similar in general form and appearance to 
that of many other allied species ; the caput is elevated, the occiput 
being the highest part, and its high transverse ridge is divided 
across the middle by a notch or groove into two quasi-segments ; 
its colour is a deep rich chestnut-brown ; the falces are rather 
deeper in colour, and the legs (which are moderately strong, not 
very long, and furnished with hairs and slender bristles) are of a 
rich deep brown colour ; the palpi are similar in colour. 
The mazille, labium, and sternum are normal in structure and 
of a jet-black colour: the eyes also are normal in position ; four 
form a small trapezoid, of which the fore side is the shortest, and are 
seated on a tubercle near the middle of the lower fore margin of the 
caput; and on either side is a lateral pair widely removed from the 
central square; the eyes of these lateral pairs are contiguous to 
each other, and each pair is seated on a strong lateral tubercular 
prominence of the fore corner of the caput. 
The abdomen is of the usual horny texture; its breadth is double 
its length; and it is armed with six prominent sharp spines of 
different lengths, none being very long; two spring from the ends 
of the fore margin, and are directed a little forwards; behind each 
of these is another (the longest of the six) very slightly curved, and 
whose direction is in the least possible degree backwards: the 
