668 Mr. Biackwaur's Descriptions of new Species of Spiders. 
shortest. Each tarsus is terminated by three claws; the two superior 
ones are curved and pectinated, and the inferior one is inflected near its 
base. The palpi have a curved, pectinated claw at the extremity. Ab- 
domen oviform, thinly covered with short hairs, convex above, projecting 
over the base of the cephalo-thorax ; it is of a red-brown colour, with a 
series of white, angular lines, whose vertices are directed forwards, extend- 
ing along the middle of the upper part ; on each side is a broad, irregular, 
yellowish band, which is palest on the upper edge, and is tinged with 
light red-brown below; underneath, an obscure, yellowish streak extends 
along each side of the medial line. Plates of the spiracles dull yellow. 
The male resembles the female in colour, and in the relative length of 
his legs, but is rather smaller than she is. The nails of the mandibles 
have a slight indentation near the middle, externally, and a corresponding 
projection on the inner side. Fourth joint of the palpi longer than the 
third, and clavate; the fifth joint consists of two parts; the shorter and 
slenderer one is attached to the upper side of the palpal organs, and the 
longer one is connected with the same organs on the inner side, and 
extends a little beyond them. Palpal organs glossy, of a globular form, 
with a pointed elongation anteriorly, which has the appearance of being 
twisted ; their colour is very dark reddish brown, approaching to black. 
Manduculus limatus occurs under stones and on bushes in the woods about 
Oakland. The male has the palpal organs com pletely developed in September. 
Compare Linyphia tenebricola, Wider, Mus. Senkenb. i. p.267. t. 18. f. 2. 
Family ErEinipx. 
Genus Eprira, Walck. 
51. Epeira celata. Cephalo-thorace pallid’ brunneo, marginibus strigis paucis 
transversis lateralibus fascidque medianá anticè pallidé brunneo-maculatá 
nigris; mandibulis maxillisque saturatè rufescenti-brunneis ; labio sterno- 
que nigricantibus ; pedibus palpisque flavescenti-brunneis albo-maculatis 
fasciatisque; pedum pari 1mo longissimo, dein 2do, 3tio brevissimo; ab- 
domine nigro brunneoque vario fascià medianâ latá dentatá anticd an- 
gustatà linedque brevi decussante flavis. 
