Mr. Blackwall's Descriptions of new Species of Spiders. 659 



in front ; the fourth joint is gibbous underneath, and has three short 

 apophyses before, the middle one, which is the largest and darkest co- 

 loured, being transversely striated in front ; fifth joint somewhat oval, 

 with a sliglitly curved, conical prominence at the upper part ; it is con- 

 vex and hairy externally, concave within, comprising the palpal organs, 

 which are prominent, highly developed, complicated in structure, with 

 a slightly curved, pointed spine, and a finer one, enveloped in a semi- 

 transparent membrane, at their extremity ; they are of a red-brown 

 colour. Tlie convex sides of the terminal joints are directed towards 

 each other. 



Both sexes of tliis species, which bears a striking resemblance to Lini/phia 

 cauta, were discovered in tiie greenhouse and melon-pits belonging to Mrs. 

 Darbishire, of Green Heys, near Manchester, in September 1836. Compare 

 Lini/phia globosa, Wider, Mus. Senkenb. i. p. 259. t. 17. f. 9. 



43. Linyphia sylvatiea. Cephalo-thorace mandibulis maxillis labio sternoque 

 saturate, pedibus palpisqueflavescenti-brunneis; abdomine fascia inediana 

 lata dentatfi saturate brunneâ albido-marginatâ ; lateribus saturate brun- 

 neis fascia longitudinali albidâ. 



Maris pedes flavescenti-rufi ; abdomen subcylindricum, saturate brun- 

 neum, antice utrinquc macula alba notatum. 



Length of the female yth of an inch; length of cephalo-thorax ^ ; breadth 

 iV ; breadth of abdomen ^ ; length of an anterior leg | ; length of a leg 

 of the third pair \. 



Ccphalo-tliorax oval, convex above, glossy, with a few slight furrows on the 

 sides, and a large indentation in the medial line of the posterior region. 

 Mandibles powerful, conical, convex in front, ai'med with two rows of 

 teeth on the inner surface, and slightly inclined towards the sternum, 

 which is heart-shaped. Maxillœ strong, straight, and somewhat qua- 

 drate. Lip semieircular and prominent at the extremity. These parts 

 are of a very dark brown colour, the cephalo-thorax being the palest. 

 The intermediate eyes form a trapezoid, whose anterior side is the short- 

 est, the posterior pair being the largest of the eight. Legs and palpi 

 long, slender, and of a yellowish brown colour, occasionally tinged with 



VOL. XVIII. 4 R 



