178 Mr. J. Blackwall on newly discovered species of Araneidea. 



The eyes are seated on black spots; the four intermediate 

 ones form a trapezoid whose anterior side is the shortest, and 

 those of each lateral pair are placed obliquely on a minute 

 tubercle and are contiguous ; the posterior eyes of the trapezoid 

 are the largest and the anterior ones the smallest of the eight. 

 The cephalo-thorax is oval, convex, glossy, with slight furrows on 

 the sides converging towards an indentation in the medial line ; 

 the falces are conical, armed with a few small teeth on the inner 

 surface, and somewhat inclined towards the sternum, which is 

 broad and heart-shaped; the maxillse are enlarged where the 

 palpi are inserted, and slightly inclined towards the lip, which is 

 semicircular and prominent at the apex ; the legs are long, slender, 

 and provided with hairs and fine spines; the first pair is the 

 longest, then the second, and the third pair is the shortest ; each 

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

 curved and minutely pectinated, and the inferior one is inflected 

 near its base. These parts are of a yellowish brown colour ; the 

 sternum, lip, and lateral margins of the cephalo-thorax are the 

 darkest, the legs much the palest, and the falces and maxillae 

 are faintly tinged with red. The palpi resemble the legs in 

 colour, with the exception of the digital joint which has a brown 

 hue ; the cubital and radial joints are short, the latter being the 

 stronger; the digital joint is oval, with a depressed, curved pro- 

 cess at the base, on the outer side ; it is convex and hairy exter- 

 nally, concave within, comprising the palpal organs, which are 

 highly developed, prominent, with a black filiform spine at the 

 extremity curved in a circular form, and are of a red-brown 

 colour. The convex sides of the digital joints are directed 

 towards each other. The abdomen is oviform, pointed at the 

 spinners, thinly clothed with hairs, glossy, convex above, and 

 projects over the base of the cephalo-thorax ; it is of a yellowish 

 brown colour, the under part being much the darkest, and has 

 an obscure series of dark angular lines, whose vertices are directed 

 forwards, extending along the middle of the upper part : between 

 the branchial opercula there is a rather prominent transverse fold. 



In the autumn 1853, males of this species, having their palpal 

 organs fully developed, were discovered among herbage growing 

 in woods about Oakland. 



Linyphia flavipes. 



Length of the male j^t^ of an inch ; length of the cephalo- 

 thorax 2^^ ; breadth ^-^ ; breadth of the abdomen -^-^ ; length of 

 an anterior leg ^ ; length of a leg of the third pair ^. 



The legs are long, slender, provided with hairs and fine spines, 

 and of a pale yellow colour faintly tinged with brown ; the first 

 pair is the longest, then the second, and the third pair is the 

 shortest; each tarsus is terminated by three claws; the two 



