1882.] REV. O. p. CAMBRIDGE ON NKW ARANEIDEA. 425 



greyish-yellow and darker hues, and with numerous prominent 

 bristly ones. 



Along the middle of the fore half of the upperside is a largish 

 paler yellow-brown somewhat oblong marking, enlarging to its 

 hinder extremity, where it has three divergent points. On the 

 middle of the hinder part of this marking is a longitudinal dark- 

 brown patch ; following this, towards the spinners, are several 

 indistinct, curved, pale transverse lines. The underside is pale 

 yellowish brown. 



This species was founded upon a Spider received in a dried and 

 pinned state from Mr. T. J. Melliss, by whom it was captured in 

 the island of St. Helena. The legs were set out laterally ; and the 

 various structural characters of the Spider presenting a striking 

 agreement with some of the ThomisidcB represented by the genus 

 Olios, led me at the moment to include it in that genus. Subsequently, 

 however, I received a fine well-conditioned example in spirit of 

 wine, and at once saw that it was not a laterigrade Spider at all, but 

 belonged probably to some unknown genus of Drassidce. This is 

 also confirmed by the opinion of Mons. Simon, to whom I lately 

 sent it for examination, its nearest allies being probably the genus 

 Clubiona. 



Arachosia, g. n. (nom. propr.). 



Cephalothorax oval ; lateral marginal constrictions well marked ; 

 anterior portion of caput (at the insertion of the falces) truncated in a 

 straight line, the corners being a little prominent ; profile-line even 

 and almost level, very slightly highest at the beginning of the pos- 

 terior slope. 



Eyes small, and not greatly different in size, in two transverse rows, 

 of which the anterior (or lower one) is nearly straight, and the pos- 

 terior very strongly curved ; the convexity of the curve directed 

 backwards. The eyes of the lateral pairs are pretty widely sepa- 

 rated. 



Legs not very long, strong, 4, 3, 1, 2 (3, 1, and 2 being very nearly 

 of equal length), armed with hairs and slender spines ; terminal 

 tarsal claws two, with claw-tuft and scopula (not dense) beneath the 

 tarsi and metatarsi. 



Falces moderately long and strong, prominent at their base in 

 front, and a little directed forwards. 



MaxillcB rather long, straight, sides nearly parallel, rounded on 

 the outer sides at their extremity, and obliquely truncated on the 

 inner sides. 



Labium about half the length of the maxillae, oblong, and rounded 

 at apex. 



Sternum oval, pointed behind. 



Abdomen elongate-oval, of a somewhat cylindrical form, fitting 

 fairly up to but not over the thorax; at the middle of the 

 underside is a largish transverse curved slit or aperture, leading 

 doubtless to a respiratory apparatus. This aperture is covered with 



29* 



