236 REV. O. P. CAMBRIDGE ON THE [Feb. 20, 



narrow elongate-oval form ; it is about balf tbe length of the radial 

 joint, and has a few sbort spiny bristles near its margins : the palpal 

 organs are small, consisting of an oval, slightly convex, corneous lobe 

 from which a small black spine issues at the extremity on the inner 

 side, and a small, dark-coloured, corneous prominence at the outer 

 extremity, being very much like those of D. lapidicolens. The falces 

 are long, strong, a little prominent at their base in front, and project 

 very slightly forwards. The maxillae are very strong ; they are straight 

 but enlarged at their extremities, which are somewhat rounded, and 

 inclined towards the labium, strongly impressed obliquely across their 

 middle portion, and very prominent, or gibbous, at their base. The 

 labium is of a somewhat oblong form, but wider in the middle than 

 either at its base or apex, which last is truncate ; these parts, as also 

 the margins of the sternum, have some erect black bristly hairs upon 

 them. The abdomen is oval, and projects a good deal over the base 

 of the cephalothorax ; the spinners are rather long and cylindrical in 

 form, those of the superior and inferior pairs being of equal length. 



A single adult male of this very distinct Drassus was found under 

 a stone at Jerusalem. 



Drassus senilis, sp. nov. (Plate XV. fig. 13.) 



Female adult, length 3f lines. 



This Spider is allied to D. mundulus {supra, p. 234), as well as to 

 D. sericeus (Bl.) ; it is of ordinary form and structure. The cephalo- 

 thorax is of a dark bright red-brown, clothed pretty densely with a 

 fine, greyish-white, silken pubescence, among which are a few slender, 

 bristly black hairs. 



The eyes are in two slightly and equally curved rows, those of the 

 lateral pairs being brought nearer to each other than the two fore 

 centrals are from the two hind centrals ; these form a rectangle whose 

 transverse diameter is the shortest ; the fore centrals are the largest 

 of the eight, and each is contiguous to the lateral on its side ; the 

 intervals between the eyes of the hinder row are equal. The legs 

 are strong, not very long, their relative length 4, 1, 2, 3, and of a 

 yellow-brown colonr ; those of the first and second pairs are the 

 darkest, especially the tibia?, tarsi, and metatarsi ; they are furnished 

 with hairs, and (chiefly on the third and fourth pairs) with spines ; 

 the tarsi and metatarsi of the first and second pairs, with the tarsi 

 of the third pair, have a double longitudinal series of short, bristly, 

 divergent hairs (perhaps the tarsi of the fourth pair had been denuded 

 of similar hairs ?). The abdomen is oval, truncate before and broadest 

 behind ; it projects a good deal over the base of the cephalothorax, 

 and is of a dull brownish-yellow colour, thickly clothed with blackish 

 and grey hairs, most of which are of a somewhat silky nature ; there 

 is a strong black-brown stripe, broader behind than before, on the 

 upperside in the central line of the fore part ; and the space imme- 

 diately round this shows the yellowish ground-colour more distinctly 

 than the rest of the surrounding surface ; the underside is less 

 thickly clothed with hairs than the upper, and shows two fine, dusky, 

 brownish, longitudinal and nearly parallel lines along its centre. 



