^8 Mr. J. Blackwall on new species of 



under side ; tlie radial joint is provided with an apophysis on the 

 outer side, which has a long slender termination, obtuse at its 

 extremity; the digital joint is narrow, oval, convex and hairy 

 externally, concave within, comprising the palpal organs, which 

 are highly developed, not very complicated in structure, convex 

 and prominent at the base, with an obtuse protuberance on the 

 outer side, and a slightly curved spiny process on the inner side 

 whose point constitutes their anterior extremity ; they are of a 

 dark brown colour. h 



This remarkable species, which is nearly allied to Salticus tar- 

 digraduSj but presents several obvious points of difference in 

 structure and colour, I dedicate to Professor Sundevall of Stock- 

 holm, as a testimony of the grateful sense I entertain of the 

 handsome manner in which he put me in possession of his ex- 

 cellent works on arachnology, and of the important infonnation 

 contained in the written communication which accompanied them. 



Family Thomisid^. w 



Genus Thomisus, Walck, 

 11. Thomisus citreus. 



Thomisus ciYrei^, Walck. Hist. Nat. des Insect. Apt. t.l. p. 526; 

 Latr. Genera Crust, et Insect. 1. 1. p. Ill; Sundevall, Vet. Acad. 

 Handl. 1833. p. 219; Hahn, Die Arachn. b. 1. p. 42. tab. 11. 

 fig. 32; Blackw. Linn. Trans, v. 19. p. 122. 



Thomisus dauci, Hahn, Die Arachn. b. 1. p. 33. tab. 9. fig. 27; 



The collection contained specimens with and without a red 

 longitudinal band on each side of the anterior part of the ab- 

 domen. 



Genus Philodromus, WalcL 

 12. Philodromus pernicc. 



Length of the female y^ths of an inch ; length of the cephalo- 

 thorax i ; breadth ^ ; breadth of the abdomen | ; length of a leg 

 of the second pair f ; length of a leg of the fourth pair |f . 



Eyes disposed on the anterior part of the cephalo-thorax in 

 two curved transverse rows, in the form of a crescent, whose con- 

 vexity is directed forwards ; the lateral eyes of the posterior row 

 are seated on minute tubercles, the intermediate pair of the same 

 row being rather the smallest, and the intermediate pair of the an- 

 terior row rather the largest of the eight. Cephalo-thorax nearly 

 circular, but compressed before, truncated in front, and abruptly 

 sloping behind ; it is convex, thinly covered with yellowish gray 

 hairs, and is of a yellowish brown colour, with a large irregular 

 dark brown band extending along each side to the region of the 

 eyes, where a junction of the two takes place, and a longitudinal 

 line of the same hue, whose anterior extremity is the longest, in 



