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



This Spicier, in the general tone of its colour, resembles both T. 

 sabalosus (Koch) and the variety of T. audax (Koch) found on 

 heaths in England ; but it may at once be distinguished from them 

 by its very spotted appearance, the whole of the abdomen, both 

 above and below, being spotted with conspicuous blackish spots and 

 markings, leaving, however, the ordinary pattern of this group quite 

 distinct. 



The cephalothorax and legs are marbled, or mottled, with cream- 

 white and deep yellow-brown ; the former has the usual character- 

 istic markings along its centre, but modified by its broken or den- 

 tated margins. The whole Spider is tolerably thickly clothed with 

 prominent and strongish, black, spine-like bristles. 



Examples of both sexes, but neither of them quite adult, were 

 found at Hebron and on the plains of the Jordan, running on the 

 ground. Though immature, its very striking and spotted appearance 

 proves it to be a good and distinct species. 



Thomisus tristrami, sp. nov. (Plate XIV. fig. 16.) 



Male adult, length 2 lines. 



This fine and distinct species has the cephalothorax of the ordinary 

 form, but the normal lateral constriction and other indentations are 

 less strong, in fact the latter are almost imperceptible ; it is glossy, 

 and minutely punctured with small impressed points ; its colour is a 

 deep red-brown, the ordinary central longitudinal marking being 

 entirely obliterated in some examples, but defined obscurely in others 

 by two opposed, and slightly curved, reddish-yellow bars. The legs 

 are furnished with hairs, bristles, and spines ; those of the first and 

 second pairs long and strong ; all the joints, except the tarsi and 

 metatarsi, are of the same colour as the cephalothorax ; and the 

 articulations of the joints are defined by narrow yellow- white bands ; 

 in some examples the legs are mottled more or less with reddish- 

 yellow ; the tarsi and metatarsi of the first two pairs are of a dull 

 yellow ; the legs of the third and fourth pairs have those joints also 

 coloured like those of the first two pairs ; but the tibiae and genua are 

 mottled with brown and yellow, and striped with white ; the remain- 

 ing joints are similarly but more pale-coloured than in the other legs. 



The palpi are short ; the radial joint is strong, and has a longish 

 projection, or apophysis, at its outer extremity on the upperside ; 

 this apophysis is somewhat bifid at its extreme point ; and beneath it, 

 on the outer side, is another much stronger and obtuse ; and on the 

 underside of the joint is a third apophysis, long, strong, much 

 curved, and with a small pointed prominence beneath it and towards 

 its base : the palpal organs are well developed, but not very complex ; 

 their outer margin is encircled by a strong, black, filiform spine ; and 

 towards their fore extremity is a strong corneous process, which is 

 produced into a curved sharp-pointed spine. 



The abdomen is oval, rounded behind, rather of a flattened form, 

 and projects over the base of the cephalothorax ; it is of a yellowish 

 colour, mottled and marked with deep red-brown and white (with 

 the latter most conspicuously on the sides). The ordinary dentated 



