38. Mr. J. Blackwall on new Species of East-Indian Spiders. 
Family THomisip#&. 
Genus THomisus, Walck. 
Thomisus tuberosus. 
Length of the female 2ths of an inch; length of the cephalo- 
thorax 3, breadth 3,; breadth of the abdomen }; length of an 
anterior leg 44+; length of a leg of the third pair }. 
The abdomen is somewhat depressed, broader at the posterior 
than at the anterior extremity, rather pomted at the spinners, 
and projects over the base of the cephalothorax; the upper part 
is of a pale olive-brown colour; the sides are marked with 
brownish black, which extends to the upper surface near its 
middle and anterior extremity; the under part is of a dull yel- 
low hue, and is marked with four longitudinal rows of minute 
punctures, the two intermediate ones, which converge towards 
the spinners, being the most conspicuous; a broad, brownish- 
black mark, trifid at its extremity, and sending off a lateral 
branch immediately below each branchial operculum, occupies 
the middle space ; the sexual organs are minute and of a dark 
reddish-brown hue, that of the branchial opercula being brown ; 
on the upper part, sides, and front, there are about forty glossy 
tubercles, which differ in size and colour; three, situated on 
each side of the medial line, are disposed in pairs, the two inter- 
mediate ones being the largest and lightest-coloured ; and im- 
mediately behind those of the anterior pair, which are oval and 
of a dark reddish-brown hue, there is a conspicuous pair of de- 
pressed spots; the largest tubercles constitute two pairs, united 
at their bases, situated on the upper part of the posterior half of 
each side, and below them there are two small ones of a dark 
reddish-brown hue; the prevailing colour of the tubercles is 
yellow-brown. The cephalothorax is large, convex, glossy, 
slightly compressed before, rounded on the sides, broadly trun- 
cated im front, depressed in the anterior and abruptly so in the 
posterior region, and is provided with minute tubercles in the 
medial line and on the sides; it is of a brown colour, a broad 
space extending along the middle having a yellowish tinge; the 
lateral margins and an irregular mark on each side of the medial 
line of the posterior slope have a yellowish-white hue. The eyes 
are disposed on the anterior part of the cephalothorax in two 
transverse curved rows, forming a crescent whose convex side is 
before; the lateral eyes, which are seated on tubercles, are 
larger than the intermediate ones, those of the anterior row 
being the largest of the eight. The falces are short, strong, 
cuneiform, and vertical; and the maxille are inclined towards 
the lip, and somewhat, pointed at the extremity. These organs 
