ARANEIDEA. 67 



whitish, the sides yellow-brown with a greenish tinge; the broad median longitudinal band, 

 to a little distance behind the eyes, is pale yellow-brown, and the remainder is suffused with 

 white ; the ocular area and the middle part of the clypeus are also suffused with white. 



The ayes are very small, seated on strong tubercles in a crescent form. The hind-laterals 

 are the most prominent of the tubercles, forming the fore-angles of the caput ; those of the 

 fore-central pair are slightly the largest of the eight; the intervals between those of the 

 lander row are equal, as are, apparently, also those between the eyes of the anterior row ; 

 the interval between those of each lateral pair is less than that between the fore and hind- 

 central pairs. The four central eyes form a square whose posterior side is longer than the 

 rest. The height of the clypeus is less than half that of the facial space. 



The legs of the first pair are moderately long, slender, of a dull whitish-yellow colour, 

 and armed witli two parallel rows of short spines beneath the metatarsi. The legs of the 

 second pair were absent ; those of the third and fourth pairs are much shorter than the 

 lirst the third slightly the shortest ; they are rather paler in colour than the first, and have 

 no spines. 



The palpi were both absent. 



The maxillae and labi-um are of normal form, and similar to the legs in colour. 



The sternum is nearly round, slightly hollow at the fore extremity, and its colour is 

 whitish yellow. 



The abdomen is large, considerably convex above, and. projects greatly over the base of the 

 cephalothorax ; its hinder extremity is the broadest and most massive, and it is of a uniform 

 yellow-white colour above, whiter on the sides and underneath. 



Hub. On the road from Yarkand to Bursi, between May 28th and June 17th, 1874. 



71.- THOMISUS ALBENS, sp. n. 



Immature female : length rather over 2 \ lines. 



The cephalolhorax has the slope of its sides and hinder part gradual and not very 

 steep. The angular prominences at the fore-corners of the caput are strong ; the clypeus 

 projects forwards, and its height exceeds half that of the facial space. The colour of the 

 cephalothorax is dull pale-yellowish, very slightly tinged with brown ; the ocular area, all 

 the middle portion of the clypeus, and a large arrow-head-shaped patch on the occiput (the 

 point of the arrow running backwards to the hinder margin), are white, the sides, and part 

 immediately behind the eyes, being also slightly veined with white. 



The eyes are very small, seated on tubercles in two curved rows in the usual form of a 

 crescent : those of the hind-central pair are further from each other than each is from the 

 hind-lateral eye on its side, while the fore-centrals are considerably nearer together than each 

 is to the fore-lateral on its side ; those of each lateral pair are also much nearer together than 

 the fore and hind-central pairs are to each other, the front row being much the more 

 strongly curved. The four central eyes form nearly a square, the anterior side being consi- 

 derably shortest, and the posterior one slightly the longest. 



The legs of the first and second pairs are moderately long and tolerably strong ; the second 

 are, if anything, slightly the longest. They are of a pale dull yellowish colour suffused 

 below with white, and the metatarsi are armed beneath with two longitudinal parallel rows 

 of short spines ; beneath the fore extremity of the tibiae are one or two more spines, but 



