10 
SECOND YARKAND MISSION. 
8. — Drassus interpolator, sp. n., PL I, Eig. 7, (? . 
Adult male : length 4| lines. 
The cephalothorctx is oval, truncated and narrowest before, and tolerably constricted 
on the lateral margins of the caput; the profile line slopes gradually forwards from the 
beginning of the hinder slope of the thorax ; its colour is yellowish-brown radiated with 
darker stripes, which follow the directions and lines of the thoracic and other normal indenta- 
tions ; the whole surface is pretty thickly clothed with yellowish-grey pubescence. 
The eyes are in the usual two transverse curved rows, the hinder one of which is the 
longest and the most curved; those of the hind-central pair are separated by more than a 
diameter’s distance from each other, and are thus rather nearer to each other than each is to 
the lateral of the same row on its side ; those of the fore-central pair are slightly the largest 
of the eight, and rather further from each other than each is from the fore-lateral eye on its 
side ; those of each lateral pair form an oblique line, and are divided by an interval of nearly 
about an eye’s diameter. The height of the clvpeus is equal to the diameter of one of the 
fore-central eyes. 
The legs are rather long and not very strong ; their relative length is 4, 1, 2, 3 ; they 
are of a dull yellow-brown colour, clothed with sandy-greyish pubescence, and other hairs 
and spines, the latter are for the most part long and rather strong, and, besides a small claw- 
tuft under the two terminal tarsal claws, each tarsus has a scopula (though not a very dense 
one) underneath it. 
The palpi are rather short and not very strong ; the lengths of the cubital and radial joints 
are about equal ; the latter increases in strength gradually to the fore-extremity, at the outer 
side of which there is a small tapering apophysis, whose point* ends with a small, slightly 
curved, corneous-looking claw or nail ; the direction of this apophysis is rather away fr orQ 
the digital joint. The radial joint is furnished with strong bristles, and a long spine on the 
outer side towards tlie hinder extremity ; the digital joint is of an elongate-oval form, atici 
equals in length the radial and cubital joints taken together ; the palpal organs are not 
complex ; the surface of the main lobe is traversed and surrounded by two red-brown, 
corneous-looking fillets, resembling closely applied spines, and there is dark red-browm 
corneous prominence near the fore-extremity of these organs; the digital joint is dai 
yellowish-brown , and hairy, and has a strongish spine on its outer margin ; the colour of the 
other joints of the palpi is similar to that of the legs. 
The f aloes are moderately long and strong, and their direction is rather forwards; they 
are of a dark red-brown colour and furnished with hairs and bristles. 
The maxillae are tolerably long and strong, slightly curved and inclined towards the 
labium, and strongly impressed in an oblique direction across the middle ; their extremities 
are rather rounded, and their colour is yellowish red- brown, pale whitish at the extremi- 
ties. 
The labium is of an oblong form, truncated at the apex, and similar to the maxm 
in colour, its length being nearly about two-thirds that of the maxillae. 
The sternum is of a dull brownish-yellow colour, and of an oval form, pointed at i s 
hinder extremities, and depressed between the insertions of the legs. # ^ 
The abdomen is of a rather narrow-oval form, and moderately convex above ; it is 
a dull brownish clay-colour, thinly clothed with hairs, and has an oblong, dull-brown, 
median longitudinal marking, whose hinder extremity is gradually produced into a sharp p 01 
