undescribed Genera and Species o/'Araneidse. 349 



length of an anterior leg J; length of a leg of the third 

 pair J. 



The male, though smaller than the female, resembles it in 

 colour, and in the relative length of its legs; but their absolute 

 length is greater, an anterior one measuring f ths of an inch. 

 The third and fourth joints of the palpi are short, the latter, 

 which is the stronger, being very convex on the outer side; 

 the fifth joint is somewhat oval with a pointed apophysis, 

 curved outwards, near its articulation with the fourth joint ; it 

 is convex externally, concave within, comprising the sexual 

 organs, which are highly developed, complex with spiny pro- 

 cesses, the largest curving over the upper part of the fifth 

 joint, and are of a red-brown colour. 



I obtained specimens of this species in September 1833, on 

 the posts and rails of stages erected for the purpose of drying 

 oak-bark in the woods at Oakland. 



Liny phi a fuliginea. 



Cephalothorax of the male of an elongated oval form, having 

 a large indentation in the medial line of the posterior region. 

 Maxilla? straight, enlarged at the extremities. Lip semicir- 

 cular, prominent at the apex. Mandibles long, powerful, 

 conical, armed with two rows of minute teeth on the inner 

 surface, and inclined towards the pectus, which is heart- 

 shaped. The colour of these parts is dark brownish-black. 

 Legs long, slender, and of a light red-brown colour. Each 

 tarsus is terminated by three claws ; the two superior ones are 

 pectinated, and the inferior one is inflected near its base. 

 Colour of the palpi the same as that of the legs, with the 

 exception of the ultimate and penultimate joints which are 

 brownish-black ; third and fourth joints short, the latter be- 

 ing much the stronger, particularly at its anterior extremity; 

 fifth joint of an oblong oval figure pointed at its termination ; 

 it is convex above, concave within, comprising the sexual 

 organs, which are highly developed, complicated in structure, 

 with a long, slender, prominent spine curved upwards and 

 somewhat outwards in a circular form ; they are of a brownish- 

 black colour tinged with red. Abdomen nearly cylindrical, of 

 a brownish-black colour with a white spot on each side of the 

 medial line, on the upper part near the cephalothorax. Plates 

 of the spiracles dark-brown. 



Length, from the anterior part of the cephalothorax to the 

 extremity of the abdomen, j'jjths of an inch ; length of the 

 cephalothorax y 1 ^ ; breadth ^ ; breadth of the abdomen ^ ; 

 length of an anterior leg T \; length of a leg of the third 

 pair f 



