86 SECOND YARKAND MISSION. 



length is 4, 1, 2, 3, but the difference between those of the first and fourth, and of the second 

 and third pairs, respectively, is not great. 



The palpi are tolerably long and strong, similar to the legs in colour and hairy clothing ; 

 the humeral joint has three spines of equal length close together in a transverse line on the 

 upper side at the fore extremity. The radial joint is longer than the cubital, and the digital 

 joint, which is darker than the rest, slightly exceeds in length the radial joint, whose width 

 it considerably exceeds at the base, its fore extremity being rather attenuated. The palpal 

 organs are rather simple, with a prominent subconical hook-pointed process, about the 

 middle of their outer side. 



The falcea are long, powerful, straight, perpendicular, of a deep black-brown colour ; 

 clothed with grey pubescence and long dark bristly hairs. 



The maxillae and labium are of normal form, and of a deep blackish red-brown colour ; 

 the sternum is of the same colour, oval and truncated before ; these parts are furnished with 

 strong dark bristles. 



The abdomen is of moderate size and convexity above ; the upper part and sides are 

 dark brown, thickly clothed with grey hairs, shewing some curved transverse lines, formed by 

 these hairs on the hinder half. The whole of the under part, extending also a little way up 

 the sides, is jet-black. 



Sab. On the road across the Pamir from Sirikol to Panja and back, between April 

 22nd and May 7th, 1874. 



Genua TARENTULA, Sund. 



108. TABENTULA IRASCIBILIS, sp. n. 



Immature female : length 3| lines. 



The cephalothorax is oval, the caput a little produced and rather strongly constricted 

 on the lateral margins ; the fore margin is broad and truncated, and the lower part of 

 the sides rather gibbous ; it is of a yellow colour tinged with orange-brown ; on the upper 

 part of each side is a broad longitudinal darkish yellow-brown band traversed by still 

 darker converging lines showing the normal indentations ; the lateral margins are also marked 

 with some broken irregular brown spots and markings. The ocular area is blackish-brown, 

 and the height of the clypeus is nearly about equal to the diameter of one of the fore- 

 central eyes; the surface of the cephalothorax is thinly clothed with a greyish silky 



pubescence. 



The eyes are in the ordinary position, forming an area as long as it is broad, though 

 narrower in front than behind ; the eyes of the middle and posterior rows are very large, and 

 appear to be very nearly, if not quite, equal in size ; the interval between the middle ones 

 is equal to, or a little more than, a diameter, being less than that between each and that of 

 the hinder row opposite to it ; the length of the hinder row is greater, though not very 

 much, than that of the middle row, which is also, if anything, a very little longer than the 

 front row ; the eyes of this last are small and equally separated ; those of the central pair 

 being but little larger than the laterals. 



The legs are tolerably long and strong ; their relative length being 4, 1 , 2, 3 ; they 

 are yellow, annulated, though not very distinctly, with broken and angular brown annu- 



