38 Mr. J. Blackwall on new Species of East-Indian Spiders. 



Family TnoMisiDiE. 



Genus Thomisus, Walck. 



Tkomisus tuberosus. 



Length of the female fths of an inch ; length of the cephalo- 



thorax ^, breadth ^^ ; breadth of the abdomen } ; length of an 



anterior leg l\ ; length of a leg of the third pair ^. 



The abdomen is somewhat depressed, broader at the posterior 

 than at the anterior extremity, rather pointed 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 in 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 maxillae are inclined towards 

 the lip, and somewhat pointed at the extremity. These organs 



