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 falces are long, powerful, straight, perpendicular, of a deep black-brown colour ; 
clothed with grey pubescence and long dark bristly hairs. 
The maxillce 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. 
jjab. — On the road across the Pamir from Sirikol to Panja and back, between April 
22nd and May 7th, 1874. 
Gemm—TARENTULA, Sund. 
108. — Tauentttla ibascibilis, sp. n. 
Immature female : length 3J lines. 
The cephalo thorax 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 stiff 
darker converging lines showing the normal indentations; the lateral margins are also maike 
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 5 tlie surface of tlie cephalotliorax is thinly clotiiecl with a gieyish sil y 
pubescence. < _ v 
The eyes are in the ordinary position, forming an area as long as it is broad, thoug 
narrower in front than behind; the eyes of the middle and posterior rows are very large, an 
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 o 
the hinder row opposite to it ; the length of the hinder row is greater, though not 
much, than that of the middle row, which is also, if anything, a very little longer than 
front row ; the eyes of this last are small and equally separated; those of the central pai 
being but little larger than the laterals. , 
The leys are tolerably long and strong; their relative length being 4, 1, 2, 3, t ^ 
are yellow, annulated, though not very distinctly, with broken and angular brown ann 
