THERIDION. 206 
Sternum subtriangular, heart-shaped, obtuse at its posterior extremity, and with a low roundish prominence 
opposite to the insertion of each of the legs; colour similar to that of the cephalothorax. 
Abdomen short-oval, very convex above; colour black, with a conspicuous central tapering longitudinal 
dentated white band on the upperside, and a slightly oblique white stripe on each side, behind which is 
a white spot, an elongate white spot also occupies the middle of the anterior extremity ; in some examples 
the central band and lateral oblique white stripes are broken up into mere spots, and the ground-colour in 
those parts is then seen to be of a dull yellowish-brown. The underside is yellowish-brown, marked with 
black-brown. The genital process is rather prominent and of characteristic form, with a small round 
whitish projection in the middle. Spinners short, strong,compact. Colulus short, broad, a little broadest 
at the apex. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith); GuateMa.a, Chicoyoito (Sarg). 
Mr. Sarg speaks of the spots on the abdomen (now quite white) as being pale yellow 
in life. 
Theridion florens, sp. n. 
Adult female, length slightly over 1 line. 
Cephalothorax of normal form; ocular area prominent and a little elevated; colour dark yellow-brown, with 
obscure darker converging lines and markings; lateral marginal impressions slight and gradual; clypeus 
equal to half that of the facial space, much impressed immediately below the eyes, and produced in a 
tapering obtusely rounded form at its lower margin. 
Eyes very nearly of equal size, the laterals apparently rather the smaller and occupying a large area, the whole 
width of the fore extremity of the caput. The four centrals form a large quadrangle distinctly longer 
than broad; the slight curve of the posterior row has its convexity directed backward, that of the anterior 
row (which is very great) forward. The intervals between those of the posterior row are equal, being 
equal to the diameter of the hind-centrals; the direction of the lateral pairs, the eyes of which are con- 
tiguous, is at right angles to the posterior row. The fore-centrals are placed in front of a strong some- 
what hemispherical prominence, and are separated by less than a diameter’s interval, and each is very 
near but not contiguous to the fore-lateral eye next to it. 
Legs rather short, 1, 4, 2, 3, moderately robust ; colour brownish-yellow, suffused gradually with darker yellow- 
brown towards the anterior extremities of the femora and tibic ; they are furnished with hairs and a few 
slender bristles. 
Palpi short, slender, and similar to the legs in colour. 
Mawille less directed over the labium than usual, otherwise normal. 
Labium broad, scarcely one-fourth as high as it is broad; apex rather rounded at the corners; colour (with 
that of the maxille) yellow-brown. 
Sternum subtriangular, heart-shaped, rather longer than broad ; its posterior extremity a little drawn out, but 
roundly obtuse; the space between the posterior cox of the legs is equal to a diameter of the latter. 
Colour of the sternum yellow-brown suffused in parts with a deeper hue. 
Abdomen large, almost globular, but pointed at the spinners. Colour dull brownish, with a large, jet-black, 
somewhat round-cornered quadrate area on each side of the upper part; between the fore extremity of 
these black patches are two longitudinal parallel rows of pale spots; the hinder part and a portion of the 
lower side (of the black patches) are edged with a conspicuous somewhat curved or subangular white 
line; these lines meet and form an angle at the middle of the abdomen ; the hinder part of the abdomen 
has a strong black angular line or chevron followed by several short transverse black lines near the 
spinners; the sides also and the underside have some black markings or patches. Spinners short, 
compact, the superior pair yellow-brown, the inferior black. Genital aperture small, simple, and incon- 
spicuous, but characteristic in form. 
Hab. Mexico, Tabasco (H. H. Smith). 
This spider is nearly allied to, but quite distinct from, Theridion migrans, Keyserling, 
