151 



The cephalo-thorax is dark brown, almost black ; the legs and 

 palpi pale yellowish-brown, and the abdomen (which is of a 

 short oval form, and very convex above) is of a deep black-brown 

 colour ; the ocular area is furnished with some short, prominent, 

 bristly hairs. 



A single example, f ound at Bloxworth in May, 18C1, remained, 

 until lately, unique; but on the 22nd of June, 1877, I found 

 another among star grass, on the sand-hills near the sea, at 

 Studland. 



WALCKENAERA CRASSICErS. 



Eeioone cbassiceps, Wcstr., Aran. Suec, p. 231. 



The length of the male is about l-14th or l-15th of an inch. 



This spider is nearly allied to Walckenaera lmmilis, Blackw., and 

 still more closely to the last species, Walckenaera affinitata, Cambr. 

 The caput is considerably elevated and prolonged forwards, the 

 extremity boing somewhat obliquely truncated, but also undivided, 

 like that of the two species mentioned. The eyes are placed in 

 four pairs, exactly north, south, east, and west, on the truncated 

 part, forming an area about half as broad again as it is long ; 

 the far greater height and length of the elevation, as well as 

 the larger size of the spider, distinguish it at once from Walckenaera 

 hiniilis. From Walckenaera affinitata, to which it bears a closer 

 resemblance, it may be distinguished by the occiput being more 

 convex, or gibbous, a peculiarity soen at once when looked at in 

 profile, the profile line of the occiput in Walckenaera affinitata 

 being of a more even, upward slope. The ocular area also is of 

 less extent in its longitudinal diameter. The clypeus exceeds, in 

 height, the length of the area formed by the fore and hind 

 central pairs of eyes ; it retreats considerably, and its profile line 

 is rather incurved. The colour of the cephalo-thorax is dark 

 brown, tinged with olive-green on the caput. The margins are 

 black, and thore are somo indistinct, radiating, blackish lines on 

 the thoracic region. The legs are slender, and of tolerablo 

 length, clothed with short, fine hairs only, and of a dull 



