Mr. J. Blackwall on new Species of Spiders. 443 



ful, conical, vertical, and provided with numerous short black 

 bristles in front, particularly towards the inner side ; the maxillBe 

 are short, enlarged where the palpi are inserted, gibbous near 

 the base, obliquely depressed near the extremity, and inclined 

 towards the lip, which is oval. These organs are of a yellowish- 

 bi-own colour, the maxillae and apex of the lip being the palest. 

 The eyes are disposed on the anterior part of the cephalothorax 

 in two slightly curved, parallel, transverse rows ; the lateral eyes 

 of the anterior row are the largest, and the intermediate eyes of 

 the same row, which are seated on a minute eminence, are the 

 smallest and darkest of the eight. The abdomen is of an oblong- 

 oviform figure, somewhat convex above, and projects a little over 

 the base of the cephalothorax ; it is sparingly clothed with short 

 hairs, and is of a soot-colour, with four lighter-coloured minute 

 depressions on the anterior half of the upper part, disposed in 

 a quadrangle ; the branchial opercula are large, and have a pale- 

 yellow hue, that of the margin of the sexual organs, which is 

 oval, being red-brown. 



The sexes are similar in colour, but the male is rather the 

 smaller. The cubital and radial joints of its palpi are short ; and 

 the latter, which is xather the larger, projects a strong, pointed 

 apophysis from its extremity, on the outer side ; the digital joint 

 is oval, convex and hairy externally, concave within, comprising 

 the palpal organs, which are moderately developed, not very 

 complex in structure, with two black, cm-ved, pointed spines and 

 some whitish membrane at their extremity, and are of a red- 

 brown colour, intermixed with pale brownish-yellow. 



In the summer of I860, I received from Mr. Francis Walker 

 adult males and females of Drassus pedestris, which he had taken 

 in Guernsey and Serk, two of the Channel Islands ; and shortly 

 after, the Rev. O. P. Cambridge transmitted to me specimens of 

 the same species captured by him in Portland. I have been 

 induced to give a detailed description of both sexes of Di'assus 

 pedestris, as ^I. Koch, who had no knowledge of the female, has 

 merely described the male in a state of immaturity ; consequently 

 he was unable to give several important specific characters con- 

 nected with its external organization, which are now supplied. 



Family Ciniflonid^. 



Genus Orithyia, Blackw. 



Orithyia TVilliamsii. 



The male is smaller than the female, which it resembles in 

 colour J but the entire upper surface of the femora of the anterior 



