454 REV. O. P. CAMBRIDGE ON NEW BRITISH SPIDERS. 
by the much larger digital joint and longer and stronger coiled spine connected with the 
palpal organs. A single specimen was found by myself among heath at Bloxworth, in 
May 1863. It is also closely allied to Erigone brevipes, Westr., of which the male has 
not been described. Since the above description was made, I have found several exam- 
ples of W. scabrosa (male) among moss (in April 1869) at Bloxworth Rectory. 
WALCKENAERA DICEROS, n. sp. (Pl. 57. no. 39.) 
Male adult, length 35 of an inch. 
Cephalothoraz broad, almost circular, rather narrower in front than behind, about 
half the length of the whole spider; very slightly elevated in the ocular region, but no 
frontal eminence properly so called; the lateral furrows are but slightly defined; a 
broadish longitudinal indentation occupies the median line of the hinder part; and a deep 
one commences behind each lateral pair of eyes, and, running obliquely back, dilates and 
terminates towards the hinder part of the occiput, which is divided from the thorax by a 
deepish groove. 
Eyes in four pairs ; unequal in size; those of the front pair are the smallest; those of 
the hinder pair are margined with black and considerably the widest apart; those of the 
front and lateral pairs are respectively near together, but do not touch each other, and 
are seated on black tubercles ; in the middle of the forehead, immediately in front of each 
eye of the hinder pair is a small tubercle, from which rises a conspicuous blackish hornlike 
projection directed forwards and slightly outwards, and a little enlarged at its extremity, 
where it is deflected and divided; under a powerful lens these horns appear to be com- 
posed of several contiguous spiny bristles; the front pair of eyes have some strong hairs, 
or bristles, springing up about them and directed forwards. | 
Legs moderate in length and strength, furnished with hairs and a very few minute, 
erect, fine black bristles. Colour brown, with a reddish hue; genual joints paler and 
semidiaphanous. de o m 
Palpi not very long, paler-coloured than the legs; cubital joints longer but less strong 
than the radials, which haye a small projection on their underside, are protuberant on 
their outer sides, and much elongated rather on their inner sides in front; the projection 
or elongation is rather prominent, deepens in colour, and is slightly dilated towards the 
extremity, which is rather obliquely truncated ; it is furnished with some short strong 
hairs, and extends to about three fourths of the length of the digital joint; this joint is 
oval, with a large lobe on the outer side, and clothed with hairs; palpal organs highly 
developed, complicated, and with a strong black spine curved in a circular form round 
their extremity. | 
Falces moderately strong, rather inclined towards the maxillse, and slightly divergent 
at their extremities. ; d 
Maxille strong, inclined towards the labium, which is short, broad, and nearly semi- 4 
circular. : 53 
Sternum broad, heart-shaped, and convex. All these parts are similar to the cephalo- 
thorax in colour. | pr. 
Abdomen small, short oval; very convex above, and projecting greatly over the base of 
