Mr. J. Blackwall on new Species of Spiders. 407 



half, forming an acute angle whose vertex is directed forwards ; 

 a whitish streak passes from the depression at the vertex of 

 the angle a little beyond its base ; and the whole is encircled 

 by an irregular zone of the same hue, which has several trans- 

 verse black bars on each side of its posterior half ; there are 

 two black streaks on the posterior part, which meet in an angle 

 at the coccyx ; the sides and under part are of a brownish- 

 black colour ; the former are the darker, and the latter is in- 

 distinctly freckled with yellowish-grey ; the sexual organs are 

 rather prominent, nearly circular, and of a red-brown hue, the 

 margin being much the darkest ; and the colour of the branchial 

 opercula is brown, that of their inner margin being yellowish- 

 white. 



This Thomisus^ which was found on a rail at Hendre House 

 in September 1868, I dedicate to that excellent naturalist 

 Thomas Glover, Esq., of Smedley House, near Manchester, 

 who on various occasions has transmitted to me specimens of 

 rare British spiders. 



Genus Olios, Walck. 

 Olios antillianus. 

 Olios antillianus, Walck. Hist. Nat. des Insect. Apt. torn. i. p. 568. 



Several adult males of an Olios ^ which appear to be specifi- 

 cally identical with the spider described under the above name 

 by Walckenaer, were taken in the Island of Bermuda. 



Family DRASSlDiE. 

 Genus Deassus, Walck. 

 Drassus Bewickii. 

 Drassus Beimckii, Blackw. Ann. & Mag. Nat. Hist. ser. 3. vol. xiv. p. 176. 



Length of the male (not including the spinners) f of an 

 inch ; length of the cephalothorax ■^, breadth -^ ; breadth of 

 the abdomen -|- ; length of a posterior leg -^ • length of a leg 

 of the second pair -^. 



The abdomen is of an oblong-oviform figure, somewhat 

 convex above, and projects very little over the base of the 

 cephalothorax ; it is glossy, sparingly clothed with hairs, and 

 of a pale-brown colour ; at the anterior extremity, contiguous 

 to the cephalothorax, there is a transverse, curved, dark- 

 coloured mark, thickly covered with long black hairs, whose 

 convexity is directed upwards; and a longitudinal soot-coloured 

 band, which is bifid at its extremity, extends nearly half the 

 length of the upper part ; to this band a series of rather ob- 

 scure, soot-coloured angular lines succeeds, which diminish in 



