THERIDION. 255 
Sternum slightly longer than broad, subtriangular, obtusely rounded at the hinder extremity, and of a dark 
yellow-brown colour. 
Abdomen large, very convex, almost globular above and projecting over the base of the cephalothorax, broadest 
towards the fore part, and obtusely pointed at the spinners. Colour jet-black, with some pale white- 
spotted markings along the central median line, indicating a broken denticulate band or stripe, the 
foremost of these markings (in one example) having a distinct cruciform shape, and on the sides are three 
short, oblique, pale narrow stripes, with some longer oblique fine lines forwards ; sides (towards the under- 
side, especially in front) whitish or marked with blackish; a belt round the spinners jet-black, edged 
outside with white ; underside in the middle blackish ; genital prominence and process red-brown and of 
characteristically distinct form. 
Hab. Mexico, Omilteme in Guerrero 8000 feet (H. H. Smith). 
Theridion albulum, sp. n. 
Adult female, length slightly less than 1 line. 
Cephalothorax nearly as broad as long, broadest across the thoracic indentation ; lateral marginal impression at 
the caput scarcely any ; fore extremity obtuse; the profile forms a slight curve. Colour light yellow- 
brown, with the normal indentations of a dusky brown hue. Clypeus a little prominent below, and less 
than half the height of the facial space. 
Eyes rather large, subequal ; those of the posterior row in a straight transverse line, the central pair rather 
nearer to each other than to the laterals, the interval being less than a diameter. The central quadrangle 
is rather longer than broad, and its anterior is longer than its posterior side; the fore-centrals are seated 
on a prominence, as also are each of the lateral pairs ; the fore-centrals are almost contiguous to the fore- 
laterals ; the anterior row is rather strongly curved, the convexity of the curve directed forwards. 
Legs not very long, 1, 2, 4, 3, slender. They are of a pale dull yellow colour, annulated with yellow-brown, 
and furnished with coarse hairs, slender bristles, and a distinct spine or two on the tibie; on the inner 
side of the genue of the fourth pair is a rather distinct prominence furnished with a short spine. 
Falces and maxille yellow-brown ; the latter are rather long and strong, greatly inclined towards the labium 
and somewhat pointed at their extremity. 
Labium much broader than high, rounded at the apex; colour yellow-brown, slightly suffused with sooty- 
brown. 
Sternum a little longer than broad, yellow-brown, suffused with sooty-brown ; its form is heart-shaped or 
subtriangular, its posterior extremity very obtusely pointed. The interval between the coxe of the fourth 
pair of legs is equal to the width of the coxa. 
Abdomen almost globular ; colour dull luteous-brown, much darker on the sides and underside, thinly mottled 
above with obscure darker spots and white points; two curved white bars, meeting at the middle of the 
fore extremity, form a border to the fore side, and an agglomeration of the white spots forms an 
irregular broken median longitudinal band on the upperside, and ends in a large white spot above the 
spinners, The upper surface is thinly furnished with long, strongish, prominent, somewhat spine-like 
bristles, each issuing from a minute tubercle. The sides are rather thickly spotted with white points, 
forming a largish wedge-shaped white patch; and on the middle of the underside is a vivid white 
elongate spot of sugar-loaf form. The genital aperture is small and of a transverse oval shape. 
Hab. Panama, Bugaba (Champion). 
Theridion niveum, sp. n. 
Adult female, length rather over 13 lines, 
Cephalothorax, falces, legs, mawille, labium, and sternum clear pale yellow; a narrow longitudinal tapering 
stripe of black bisects the thorax and the occiput, where, close behind the hind-central eyes, it ends in a 
fine point. The height of the clypeus is equal to half that of the facial space. 
The eyes are small, subequal, and in two equally curved transverse rows, the anterior a little the shortest, 
the convexity of the anterior row directed forwards, that of the posterior row backwards ; the eyes of the 
posterior row are equally separated ; in the anterior row the centrals are further from each other than 
