256 ARANEIDEA. 
from the laterals. The central quadrangle forms a square. The fore-centrals are black, all the rest pearly- 
white. 
Legs moderately long, very slender, 1, 4, 2, 3; pale yellow, the extremities (and sometimes the middle) of the 
joints marked with a small blackish spot ; in some examples these spots are, many of them, obsolete. 
Abdomen large, globular, upper part and sides snowy-white, with some indistinct very fine dark lines faintly 
indicating (in some specimens) a longitudinal central dentated band and oblique lines on the sides ; 
underside dull luteous-yellowish-white. Genital aperture small, deep red-brown, and characteristic 
in form. 
Hab. Panama, Bugaba (Champion). 
Theridion trepidum, sp. n. 
Adult female, length 14 lines. 
Cephalothorax of ordinary form; its colour, as well as that of the falces, maxille, labium, sternum, legs, and 
palpi, is pale yellow; that of the cephalothorax, perhaps, rather brighter yellow than the rest, and with 
a central longitudinal furcate black line, the points of the fork reaching to the occiput. 
Eyes small; excepting the fore-centrals, they are seated on black spots and pearly-white, forming two curved 
transverse rows, the anterior row a little the shortest, and the convexity of the curves directed in opposite 
directions—that of the posterior is strongest and backwards, that of the anterior forwards. The eyes of 
the posterior row are nearly equally separated, the centrals being a little nearer to each other than to the 
laterals; the central quadrangle forms almost a square, but its posterior side is rather longer than the 
anterior. The height of the clypeus exceeds half that of the facial space. 
Legs long, 1, 2, 4, 3?, slender, furnished with long, pale, coarse hairs. 
Falees long, straight, moderately strong. 
Palpi rather long ; a long curved tapering bristle or slender spine at the fore side of each of the cubital and 
radial joints. 
Mawille tolerably strong, inclined towards the labium, somewhat obliquely truncate at the extremity, where 
they are pointed on the inner side. 
Labium much broader than long, the apex rounded. 
Sternum subtriangular, obtuse at the hinder extremity, where it bends over towards the thorax. 
Abdomen nearly globular, highest behind; colour white above and halfway over the sides; two opposed 
longitudinal curved svoty-blackish bands, somewhat indented on the margins, on each side of the upper- 
side reaching to the beginning of the posterior slope, where their ends approach but do not quite touch ; 
the space between them forms a broad, bluntly dentated or frondose central tand, and has a central 
longitudinal and branch lines on it, the black bands are also marked with a few minute white points. 
The lower part of the sides and underside are dull yellow-brown. The genital aperture is small, but of 
characteristic form. 
Hab. Guatemaua, Montafia de Chilasco (Sarg). 
Theridion transversum, sp. n. 
Adult female, length very nearly 2 lines. Adult male, length 13 lines. 
This spider (which belongs to the group of which Z'heridion denticulatum, Walck., may be taken to be the type) 
is of the ordinary form. 
The cephalothorax (?) is dark brown. The clypeus rather exceeds in height half that of the facial space, 
and its lower side is very prominent, or obiusely thrust forward over the base of the falces. 
Legs yellow, annulated or marked, but not very regularly, with dark reddish-brown, 1, 2, 4, 3, those of the 
first pair considerably the longest. They are furnished with coarse hairs. 
Falces yellow-brown. 
Mawille, labium, and sternum dark yellow-brown, the latter darkest. 
Abdomen large, very convex above, almost globular. Upperside blackish, mixed and speckled with white; a 
longitudinal, central, tapering band, dentated past the middle, and indicated by two converging white 
zigzag marginal lines, runs to the spinners. This band tapers, from the highest part of the abdomen, 
