84 SECOND YARKAND MISSION. 



by, as nearly as possible, a diameter's interval ; and each is separated from the eye of the 

 posterior row on its side by an interval of about one and a half diameters. 



The legs are moderately long, strong, and tapering, but not attenuated ; their relative 

 length is 4, 1, 2, 3, and their colour is of a pale-yellowish hue, deepening to brownish-red ; 

 the metatarsi and tarsi are pretty densely clothed with sandy- grey pubescence, mixed with 

 other darker hairs and bristles, and armed (chiefly on the third and fourth pairs) with spines ; 

 the under sides of the genua and the fore extremities of the tibiae are black- brown ; the 

 under sides of the metatarsi and tarsi of the first and second pairs, and of the metatarsi of the 

 third and fourth pairs, as well as of the digital joint of the palpi, are furnished with a dense 

 scopula of black-brown hairs. 



The palpi are similar in colour to the legs. 



The falces are long and powerful, straight, perpendicular, the profile-line convexly 

 curved, of a deep black-brown colour, thickly clothed with sandy-grey and brown hairs and 

 bristles. 



The maxillce and labium are of normal form, and bristly ; their colour is red-brown, 

 the extremities of the former and the apex of the latter having a pale-yellowish tinge. 



The sternum is oval, truncate at its fore extremity, of a dark brownish-black colour, 

 clothed with sandy- grey pubescence. 



The abdomen is oval ; it projects well over the base of the cephalothorax, and is consi- 

 derably convex above ; it is densely clothed with sandy-grey, black, whitish, and brown hairs. 

 On the upper side, the ordinary Lycosa pattern is indistinctly visible, being indicated by the 

 scattered markings formed by the darker and whitish hairs. The normal elongate marking 

 on the fore half is truncate at its posterior extremity, and a prominent subangular point on 

 each side, about the middle, is indicated by a strong blackish spot ; on the hinder half, the 

 only markings traceable (besides a generally thin sprinkling of small blackish spots over the 

 whole of the upper part and sides) are two rows of obscure spots of whitish hairs, converg- 

 ing towards the spinners ; the whole of the under side, including the spiracular plates and 

 the genital aperture, is black. 



The male is smaller, but resembles the female in colours and markings. The radial 

 joint of the palpus is considerably longer than the cubital ; the digital joint is red -brown, and 

 a little longer than the radial ; the palpal organs present no very marked peculiarity of 

 structure. 



Hab. Yangihissar, April 1874 ; between Yangihissar and Sirikol, March 1874 ; road 

 across the Pamir from Sirikol to Panja and back, between April 22nd and May 7th, 1874 ; 

 and Ydrkand, between 21st and 27th May 1874. 



105. TROCHOSA APPROXIMATA, sp. n. 



Adult female : length 6| lines (nearly). 



This spider is almost exactly like T. sabulosa in colour and markings, the grey hue, 

 however, being less marked; but it may readily be distinguished by its comparatively 

 small size, and by the under side of the abdomen being of a dull sandy hue, instead of black, 

 as in T. sabulosa. The sides of the cephalothorax also appear to be more depressed, and the 

 fore-central eyes of the front row are more nearly equal in size to those of the hinder row, 



