766 rev. o. p. Cambridge on [June 18, 



centre, and a few short hairs are distributed over its surface. Its 

 colour is deep brown above, of a somewhat bistre brown tint, the 

 underside being blackish. 



The female is rather larger than the male, but resembles it in 

 colours, except that the abdomen is blacker ; the cephalothorax is 

 gibbous above in front, but, like all others iu this genus, nothing 

 like as elevated as in the male, though preserving its general cha- 

 racters ; the form of the genital aperture is characteristic. 



Adults of both sexes were received from Dr. Ludwig Koch, by 

 whom they were captured near Nuremberg, in Bavaria. In accord- 

 ance with Dr. Koch's wish, I have here (as in other instances) re- 

 tained the name conferred upon this species, in compliment to Mr. 

 Blackwall, by Dr. Koch in his MS. notes. 



ElUGONE(WALCKENAERA)ELEGANS,Sp.n. (Plate LXVI. fig. 23.) 



Male adult, length | of a line, or T L of an inch. 



Cephalothorax deep brown, approaching to black ; the fore part 

 bluff, rounded, and massive, with a distinct but not very large oval 

 eminence on the upperside of the caput. The normal indentations are 

 very strongly marked ; and the lateral margins are depressed ; these 

 are all also otherwise indicated by blackish lines. The eyes are in 

 the ordinary position : two are situated on the fore part of the 

 upper side of the eminence on the caput ; below each of these is a 

 lateral pair, the eyes of which are contiguous and seated just below 

 the junctional groove or impression between the eminence and the 

 lower segment of the caput ; those of the fore central pair are minute, 

 contiguous, and nearly in a straight line with those of the lateral 

 pairs : a strong elongated indentation runs backwards from just 

 above and behind each lateral pair of eyes ; and the height of the 

 clypeus appeared to be slightly greater than one half of that of the 

 facial space. 



The legs are rather long, moderately strong, and of a pale yellow 

 colour ; they are furnished only with hairs. 



The palpi are short, similar in colour to the legs, except the 

 digital joints, which are dark brown ; the radial is much stronger 

 than the cubital joint, and, looked at from above and behind, is of a 

 somewhat crescent-form, with a small black, sharp-pointed, tooth- 

 like prominence in the centre of the hollow side, directed sharply 

 inwards, between the horns of the crescent ; this tooth-like promi- 

 nence appeared to terminate with a pointed spiny bristle. The 

 digital joint is moderate in size and of a short oval form, with 

 apparently one or two subangular prominences near its base. The 

 palpal organs are rather complex ; on their outer side is a rather 

 long, strongish, circularly curved black spine. The /a/ces are short, 

 strong, subcorneal, and directed backwards beneath the clypeus. 

 The abdomen is oval, and projects a good deal over the base of the 

 cephalothorax ; its colour is jet-black. 



An adult male was received from Dr. L. Koch, by whom it was 

 captured near Nuremberg, Bavaria. 



