Mr. BuackwaLvs 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 slightly 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. The convex sides of the terminal joints are directed towards 
each other. 
Both sexes of this species, which bears a striking resemblance to Linyphia 
cauta, were discovered in the greenhouse and melon-pits belonging to Mrs. 
Darbishire, of Green Heys, near Manchester, in September 1836. Compare 
Linyphia globosa, Wider, Mus. Senkenb. i. p. 259. t. 17. f. 9. 
43. Linyphia sylvatica. Cephalo-thorace mandibulis maxillis labio sternoque 
saturate, pedibus palpisque flavescenti-brunneis; abdomine fascià medianá 
lata dentata saturaté brunneà albido-marginata ; lateribus saturaté brun- 
neis fascià longitudinali albidà. 
Maris pedes flavescenti-rufi ; abdomen moin. saturatè brun- 
neum, anticè utrinque macula alba notatum. dae text 
Length of the female 1th of an inch; length of G pelo uoc x breadth 
is; breadth of abdomen 77; length of an anterior leg $; length of a leg 
of the third pair +. 
- up pi 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, armed with two rows of 
teeth on the inner surface, and slightly inclined towards the sternum, 
which is heart-shaped. Maxillæ 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 
slender, and of a yellowish brown colour, occasionally tinged with 
long, 
4R 
VOL. XVIII. 
