Mr. J. Blackwall on some new species 0/ Araneidea. 183 



organs, which are highly developed, complicated iu structui'e, and 

 of a dark reddish brown colour. 



This species was taken on rails at Oakland in February 1841. 



3. Neriene timida. Ophalo-thorace, mandibulis, maxillis, labio, 

 sternoque saturate fusco-brunneis ; pedibus palpisque pallida ru- 

 fescenti-brunneis, abdomine nigro ; pedum pari 1""° et 4**' longis- 

 simis, oequalibus, 3*^° brevissimo. 



Quoad colorem pedumque longitudinem mas foeminse similis. 



Length of the female -i^^h. of an inch ; length of the cephalo- 

 thorax ^^^^ ; breadth -^^ ' breadth of the abdomen 2V 5 length of an 

 anterior leg ^ ; length of a leg of the third pair -Jg • 



Cephalo -thorax oval, glossy, convex, with the sides depressed, 

 and a small indentation in the medial line of the posterior region : 

 mandibles powerful, conical, rather divergent at the extremities, 

 armed with teeth on the inner surface, and inclined towards the 

 sternum, which is broad and heart-shaped : maxillae strong, en- 

 larged where the palpi are inserted and at the extremity, and in- 

 clined towards the lip, which is semicircular and prominent at 

 the apex : these parts are very dark brown. The intermediate 

 eyes form a trapezoid, the anterior ones of which are the smallest 

 of the eight. Legs and palpi pale reddish brown. First and 

 fourth pairs of legs the longest and equal in length, third pair 

 the shortest. Abdomen oviform, convex above, projecting over 

 the base of the cephalo-thorax ; it is thinly clad with hairs, glossy 

 and black. Plates of the spiracles dark brown. 



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

 in colour and in the relative length of its legs. The cubital and 

 radial joints of the palpi are short, the latter being much the 

 stronger; the digital joint is oval, convex and hairy externally, 

 concave within, comprising the palpal organs, which are mode- 

 rately developed, complicated in structure, with a short prominent 

 spine enveloped in a transparent membrane at their extremity, 

 and are of a dark reddish brown colour. 



Mature males and females of this species were found on rails 

 at Oakland in April 1841. 



4. Neriene saxatilis. Mas cephalo-thorace, mandibulis, maxillis, 

 labio, sterno, pedibua, palpisque brunneis, sterno labioque satura- 

 tioribus, pedibus pallidioribus ; abdomine nigro-fusco ; pedum 

 pari 1°^° et 4*° sequalibus, longissimis, 3*^'° brevissimo. 



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

 ^ ; breadth g'^ ; breadth of the abdomen -j^ ; length of an anterior 

 leg -f ; length of a leg of the third pair -^q. 



The two intermediate pairs of eyes form a trapezoid whose an- 

 terior side is rather the shortest. Cephalo-thorax oval, glossy. 



