432 REY. 0. P, CAMBRIDGE ON NEW ARANEIDEA. [May 16, 
THWAITESIA! DIVERSA, sp. n. (Plate XXXI. fig. 8.) 
Adult female, length 2 lines. 
This Spider differs in some respects from the type of the genus, 
but whether sufficiently so to justify the formation of another genus 
- for it appears to be uncertain as yet. 
The normal indentations of the cephalothorax are less strong, and 
the eyes of the posterior row are equidistant from each other, and 
the height of the clypeus is equal to half that of the facial space ; 
the legs also are shorter and rather stronger, and are furnished with 
hairs only, but these are strong and of a bristly and even somewhat 
spinous nature. 
The maxillse are very similar to those of the type; but the labium 
is distinctly hollowed at the apex. 
The cephalothorax, falces, maxillee, and labium are of a brightish 
orange-yellow brown hue; and the sternum is of the same colour, 
with a dusky patch near its fore extremity. 
The legs are of a paler yellow hue; the fore extremities of the 
femora and tibize, with the genual joints and (more faintly) a por- 
tion near the middle of the femora and tibize of the first and second 
pairs, are red-brown, giving the legs an annulated appearance. 
The abdomen is large, and has its posterior extremity produced 
into a strong but not very long hump. When looked at inprofile,the 
distance from the spinners to the apex of the hump is rather less 
than that from the spinners to the fore extremity (on the upperside) 
of the abdomen. It is thinly clothed with hairs, and is of a pale dull 
luteous yellowish-brown colour... The posterior extremity of the hump 
is black ; and in other parts along the middle, at the back and on the 
sides, there are blackish stripes, patches, and markings; one also 
underneath (between the spinners and the genital aperture) appears 
to contain a transverse slit, probably the opening into a portion of the 
breathing-apparatus ; if this should prove to be so (of which I could 
not satisfy myself sufficiently), it would probably be a good reason for 
its separation into another genus. The genital aperture is nearly 
round, not large, but placed on a transverse oval area and surrounded 
outside again with a strong corneous-looking rim. ‘The spinners 
are short and compact. 
A single example in Mr. Traill’s Amazon collection. 
Subfamily Phoroncidine. 
Oguuntivs, g. n. (nom. propr.). 
Cephalothorax abbreviated behind ; caput rather raised and pro- 
duced, the ocular area including the whole of its anterior extremity ; 
clypeus low, considerably less than half that of the facial space. 
Eyes unequal in size, the four centrals largest, and forming a large 
trapezoid whose anterior side is much the shortest ; the lateral pairs 
are placed obliquely on small tubercles, and the eyes of each are 
contiguous to each other on either side. 
Legs projecting laterally from the sternum, moderately strong, 
