210 REV. 0. P. CAMBRIDGE ON E[ Mar. 16, 
of the eight, dark-coloured, indistinct, and seated contiguously (or 
nearly so) to each other at the extremity of the lower segment of 
the caput ; the longitudinal diameter of the ocular area is greater 
than its transverse one. 
The legs are moderately long, slender; and their relative length 
appeared to be 4, 1, 2, 3; they are furnished with inconspicuous 
hairs, and a very few slender erect bristles on their uppersides ; 
the colour of the-legs is yellow. 
The palpi are rather long, slender, and their colour is similar to 
that of the legs; the cubital joint is long and slightly clavate: the 
radial joint is short, with its fore extremity, rather towards the outer 
side, produced into a fine, tapering, pointed, almost straight apo- 
physis; the length of the joint with its apophysis is about half that 
of the cubital joint ; the digital joint is rather small, and of ordinary 
form ; the palpal organs are neither very prominent nor complex ; in 
close contact with them, and at their extremity, is a small circularly 
curved sharp filiform spine. 
The falces, maxille, and ladium are rather lighter iu colour than 
the cephalothorax, but present nothing unusual in form or structure. 
The sternum is of ordinary form, and its colour is dark black- 
brown. : 
The abdomen is of a short oval form, very convex above, and of 
a pale, dull, straw-yellow colour, with a large dark-brown oval patch 
on the fore part of the upperside ; and it is sparingly clothed with 
short inconspicuous hairs ; the spinners are rather larger than usual, 
but perhaps they may have been accidentally protruded. 
The adult female is rather larger than the male, but resembles it in 
colours and general characters; the caput, however, wants both the 
eminence and prominence of that sex, being merely of the ordinary 
form, with the occipital region slightly convex and rounded, and 
the clypeus prominent or, rather, projecting forwards. The genital 
aperture is somewhat horseshoe-shaped, and has within its opening 
some small processes, which, when looked at in profile, give it a 
rather prominent appearance. 
An adult example of each sex was sent to me in July 1871, by M. 
Simon, by whom they were found in the neighbourhood of Paris; it 
is allied to Z. trifrons (Cambr.) ; but the pale colour of the abdomen 
distinguishes it at a glance, besides the marked differences in the 
form of the caput and structure of the palpi. 
ERIGONE CAPITO (Westr.). (Plate XXVIII. fig. 18.) 
Adult male, length 13 line. 
The colour of the cephalothorax of this rare and remarkable 
Spider is a deep shining brown; the legs are orange-yellow, rather 
long, moderately strong, and furnished with hairs only; the palpi 
are similar in colour, except the digital joints, which are dark brown ; 
and the abdomen is black. 
The fore part of the caput has a strong elevation, and is divided 
into two segments—the lower one (comprising the. fore part of the 
caput proper) prominent and rather produced forwards, the upper 
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