208 Mr. J. Blackwall on new Species uf Spiders. 



breadth of the abdomen -yV; length of an anterior leg i; 

 length of a leg of the second pair 4-. 



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 tibife 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 maxillse are straight, and 

 enlarged and rounded at the exti*emity; and the lip and sternum 

 are oval. These parts are of a brownish-red colour, the falces 

 being 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 baud 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 Thomisid^. 



Genus Philodromus, Walck. 



Philodromus amhiguus. 



Philodromus pallidus, Blackw., Ann. & Mag. Nat. Hist. ser. 2. vol. xx. 

 p. 499 ; Spiders of Great Britain and Ireland, p. 93, pi. 6. fig. 56. 



This spider, when originally described by me, was supposed 

 to be specifically identical with the Fliilodromus pallidus of 

 Walckenaer and the Artamus gi'iseus 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 amhiguus therefore is substi- 

 tuted for that oi pallidus. 



Genus Sparassus, Walck. 

 Sparassus ornatus. 

 Sparassus ornatus, Walck., Hist. Nat. des Insect. Apt. torn. i. p. 683 ; 



