208 -Mr.J. Blackwall on new Species of Spiders. 
breadth of the abdomen ~,; length of an anterior leg +; 
length of a leg of the second pair +. 
The legs are robust, especially those of the anterior pair, and 
are provided with hairs and sessile spines, two parallel rows of 
the latter occurring on the inferior surface of the tibie and 
metatarsi of the first and second pairs; they have a dull-yellow 
hue, the anterior pair being tinged with red; the first pair is 
the longest, then the fourth, and the second pair is slightly 
shorter than the third ; each tarsus is terminated by two curved 
claws, below which a small scopula is situated. The minute 
intermediate eye of each lateral row is nearly equidistant from 
the eyes constituting its extremities. The cephalothorax, which 
is somewhat quadrilateral, slopes abruptly at its base, and 
projects a little beyond the falces in front; it is glossy, with a 
shallow indentation in the middle, and is of a brownish-red 
colour, the lateral eyes being seated on brown spots. The falces 
are short, subconical and vertical ; the maxille are straight, and 
enlarged ‘and rounded at the extremity; ; and the lip and sternum 
are oval. These parts are of a brownish-red colour, the falces 
bemg the darkest. The palpi are short, and resemble the legs 
in colour. The abdomen is oviform, ‘glossy, pointed at the 
spinners, which are prominent, moderately convex above, and 
projects over the base of the cephalothorax ; it is of a brown- 
yellow hue; the under part, which is the palest, has an obscure 
brown band extending along the middle, and on each side of the 
medial line of the upper part there is a longitudinal row of four 
brown spots. 
Immature females of this species have been received from the 
island of Madeira. 
Family THomisip2Z. 
Genus Puitopromvus, Walck. 
Philodromus ambiguus. 
Philodromus pallidus, Blackw., Ann. & Mag. Nat. Hist. ser. 2. vol. xx. 
p- 499; Spiders of Great Britain and lolandd p- 93, pl. 5. fig. 56. 
This spider, when originally described by me, was supposed 
to be specifically identical with the Philodromus pallidus of 
Walckenaer and the Artamus griseus of Koch ; but a comparison 
of these species, made subsequently, has not only convinced me 
that it is distinct, but has also induced the belief that it is new 
to arachnology ; the specific name ambiguus therefore is substi- 
tuted for that of pallidus. 
Genus Sparassus, Walck. 
Sparassus ornatus. 
Sparassus ornatus, Walck., Hist. Nat. des Insect. Apt. tom. i. p. 583; 
