443 



stronger and considerably produced in front, in a somewhat 

 curved form, over the base of the digital joint, pointing out- 

 wards ; its extremity being deeply cleft, or bifid ; the posterior 

 portion of tbe bifid part is prominent, and tipped with a small 

 reddish-brown point ; the anterior portion is obtuse, and adheres 

 more closely to the digital joint. Palpal organs complex, but 

 tolerably compact ; and at thoir oxtremity is a very small, fine, 

 brown spine, curved in a circular form, but almost concealed in 

 a membranous substance. 



Abdomen black and glossy. 



A single example was received from Mr. T. Workman, of 

 Belfast, by whom it was found near that city, and kindly sent to 

 me among some other spiders taken in the same locality. Sub- 

 sequently (May 15, 1879) an adult and immature males were 

 found at Bloxworth under some bricks in the Eectory yard. In 

 the form and structure of the palpi and palpal organs this 

 spider bears much general resemblance to Walckenaera erythropus, 

 Westr., but the entire absence of any elevation on the caput 

 distinguishes it at a glance from that species. The portion of 

 the structure also in the palpi of that spider corresponding to 

 the posterior part of the bifid extremity of the digital joint, 

 emerges very distinctly from beneath the joint, while in the 

 present species it appears to form part of the upper side of it. 



GENUS WALCKENAEEA, Blaclcw. 



WALCKENAERA INGRATA, Sp. n. 



Adult male ; length 1-1 6th to l-18th of an inch, that of the 

 female being a little more. 



The caput of the male of this minute spider has no distinct 

 elevation. Tho length of the hinder (or thoracic) slope is as 

 nearly as possible equal to tho length of the caput, and there is 

 a very slight depression (visible in profile) at the occiput. From 

 immediately behind each hind-lateral eye a distinct, long, taper- 

 ing, slightly curved indentation runs backwards, its fine point 

 directed to the occipital depression. The height of the clypeus is 



