1875. ] NEW SPECIES OF ERIGONE. 207 
punctured surface of the abdomen, thorax, and sternnm, and the 
structure of the palpi and palpal organs, will serve to distinguish it 
readily from other European species possessing a somewhat similarly 
formed caput. 
ERIGONE FORAMINIFERA, sp. n. (Plate XXVIII. fig. 15.) 
Adult male, length 1 line. 
The cephalothoraz is glossy and of a deep blackish-brown colour ; 
the normal indentations are tolerably strong, and the surface near 
the margins is somewhat rugulose: the caput has the fore part, 
which is rather lighter-coloured, elevated and prominent; it is divided 
into two nearly equal lobes by a deep transverse cleft ; the upper 
fore margin of the hinder lobe and the hinder margin of the front 
lobe approach each other pretty closely, but do not meet; the front 
lobe is rather the strongest, but of less height than the hinder one, 
the deepest point of the cleft is on a level with the profile line of the 
hinder part of the caput ; the summit of each lobe is furnished pretty 
thickly with hairs, some of which meet over the cleft. 
The eyes are in the usual four pairs; one pair is seated near the 
summit of the hinder lobe of the caput, an eye being on either side 
of it, another pair on the fore part near the summit of the front lobe, 
separated from each other by rather more than an eye’s diameter, 
and a pair on either side a little below the base of the cleft: the 
eyes of each of these last two pairs are contiguous to each other ; 
those of the front lobe are dark-coloured, indistinct, and the smallest 
of the eight ; the rest are conspicuous, of a shining pearl-white, and 
do not differ much in size; the height of the clypeus considerably 
exceeds half that of the facial space. 
The legs are slender, of moderate length, their relative length 
being 4, 1, 2, 3; they are of a dark orange-yellow colour, slightly 
tinged with brown, furnished with hairs, and a single, spine-like, 
prominent bristle on the upperside of each of the genual and tibial 
joints of the third and fourth pairs ; there are several other bristles 
on the corresponding joints of the first and second pairs, but these 
are slenderer and less conspicuous. 
The palpi are moderate in length and strength, of a yellow-brown 
colour, the radial and digital joints dark brown and furnished with 
hairs: the cubital joint is rather clavate, bent downwards, and much 
longer than the radial, which last, however, has the appearance of 
greater length from being produced at its fore extremity, on the upper- 
side, into a long and broad apophysis, covering a large portion of the 
digital joint ; this apophysis is of a somewhat oblong form, with a 
sharp-pointed tapering spine at its fore extremity on the inner side, 
bent sharply round and running across near its fore margin, which it 
rather exceeds in length, and a strong, rather bent, pointed promi- 
nence at its base on the outer side ; it is also rather produced behind : 
the cubital joint has a single, prominent, spine-like bristle at its fore 
margin on the upperside ; the digital joint is large and of ordinary 
form; the palpal organs are prominent and complex, with corneous 
processes and spines, and a prominent, tapering, pointed, slightly 
