438 REY. O. P. CAMBRIDGE ON NEW ARANEIDEA. [May 16, 
Maxille rather long, strong, enlarged and rounded at their 
extremities. 
Labium broad, and considerably bent in, transversely, above its 
connexion with the sternum; it is about half the length of the 
maxillee, and somewhat pointed at the apex. 
The sternum is heart-shaped, hollowed at the anterior extremity, 
and with slight eminences opposite to the insertions of the legs. 
Abdomen short and broad, but with its anterior portion greatly 
elevated and produced into a long, slightly tapering, curved pro- 
jection, which bends forwards over the cephalothorax. 
It is probable that this genus is allied to Mastigosoma, Auss., 
and Cyphagogus, Ginther, as well as to Poltys, C. L. Koch. 
WIXIA ABDOMINALIS, sp. n. (Plate XXXI. fig. 13.) 
Adult female, length 37 lines, length of abdomen (from the hinder 
extremity to the end of the anterior projection) rather over 44 lines. 
The cephalothorax and falces are yellow-brown; the clypeus, as 
well as a short, broad, oblique band towards the base of the falces, 
brown ; the extremities of the falces deep brown; the surface of the 
cephalothorax is covered pretty thickly with short greyish hairs. 
The eyes of the central group do not differ much in size. Those 
of the posterior pair are of a pale yellowish pearly colour, and seemed 
to be rather smaller than the anterior pair, which form, however, a 
shorter line, being dark-coloured and separated by no more than an 
eye’s diameter. 
The legs are dull brownish yellow, of a somewhat flattened shape, 
though not so much flattened as in Poltys or Cerostris; besides 
the spines mentioned above, they are clothed with numerous greyish 
and other hairs. The tarsi are short. 
The palpi are moderate in length and strength, and similar in colour 
and armature to the legs; each ends with a curved claw furnished 
with longish pectinations. 
The mawille and labium are dark brown tipped with whitish ; and 
the sternum is similar in colour to the legs. 
The abdomen is of a dull luteous kind of yellow-brown, clouded or 
suffused with a sooty-brown hue in front of the anterior elevation, of 
which the apex is bifid, each point ending with a round shining 
tubercle; on the hinder half of the abdomen are four largish im- 
pressed pit-like black spots, followed towards the spinners by two 
longitudinal converging rows of small diminishing deep-brown spots 
which look like tubercles; others, of a like nature, are disposed 
more or less regularly in two rows round the margins. The under- 
side is dark sooty brown; and the genital aperture is large, with a deep 
red-brown shining tubercular somewhat oval prominence on each 
side of it. The whole abdomen is clothed with short greyish and 
other hairs; between the four large impressed spots on the hinder 
part are some blackish irregular markings. 
A single example of this curious Spider was contained in Mr, 
Traill’s Amazon collection, and appears to me to belong to an un- 
characterized genus. 
