654 3Ir. Blackwall's Descriptions of new Species of Spiders. 



The male is rather smaller than the female, but resembles her in 

 colour and in the relative length of his legs. He has a large, obtuse pro- 

 minence near the middle of the cephalo-thorax, between which and the 

 anterior part, where the eyes are situated, there is a deep depression, 

 thickly clad with strong hairs. The mandibles are provided with a small, 

 conical protuberance in front, near their extremity. The fourth joint of 

 the palpi, which is rather larger than the third, projects two minute, 

 pointed aj)ophyses from its extremity ; one situated in front, and the 

 other, which is the smaller, on the inner side; fifth joint oval, convex and 

 hairy externally, concave within, comprising the palpal organs ; they are 

 neither highly developed, nor very complicated in structure, a dark red- 

 dish brown process, curved outwards, occurring at the upper part ; their 

 colour is yellowish brown, with a faint tinge of red. 



Specimens of this remarkable spider, in a state of maturity, were discovered 

 under stones in a moist pasture at Oakland, in May 1838. 



40. Neriëne tuherosa. Mas saturate brunneus ; pedibus palpisque iîavescenti- 

 brunneis ; cephalo-thorace prope medium gibboso ; pedibus posterioribus 

 anterioribus paul5 longioribus. 



Length of the male ^ih. of an inch ; length of cephalo-thorax -^ ; breadth ^ ;. 

 breadth of abdomen ^V y length of a posterior leg \ ; length of a leg of 

 the third pair ^'S- 



Cephalo-thorax oval, glossy, gibbous near the middle, with slight furrows on 

 the sides, diverging from the upper part towards the margins, and an 

 indentation in the medial line of the posterior region. Mandibles strong, 

 conical, armed with teeth on the inner surface, and a small, conical pro- 

 tuberance in front, near the extremity; they are slightly inclined towards 

 the sternum, which is broad and heart-shaped. Maxillae inclined towards 

 the lip, which is semicircular and prominent at the extremity. These 

 parts are dark brown, the mandibles and maxillte being the palest. Legs 

 and. palpi yellowish brown. Fourth pair of legs rather the longest, then 

 the first, third ])air the shortest. The intermediate eyes of the anterior 

 row are the smallest of the eight. The fourth joint of the palpi, which is 

 rather stronger than the third, projects two minute, pointed apophyses 



