LITHYPHANTES, 181 
Abdomen oval, black, with a longitudinal central narrow white stripe on the upperside, crossed by 4 or 5 others — 
one in front below the anterior upper extremity long and fine, running obliquely and sinuously backwards 
on each side, the next (more oblique on each side of the longitudinal one) shorter but also sinuous, and 
not far from the fore extremity, the next runs across the middle, at right angles, followed by one or two 
more towards the spinners decreasing in length; these last lines do not run down the sides. On each 
side is a short longitudinal angulated line whose fore-end meets the second transverse line above noted. 
The connecting pedicle is covered by a strong circular corneous socket. The fore-half of the underside 
is covered by a dark yellow-brown coriaceous plate including the plates of the spiracles. The rest of the 
underside is black, with some obscure pale yellowish markings on each side. A small transverse slit in 
the middle towards the spinners, and another longer one just in front of them, are probably the orifices of 
tracheal organs. Spinners short, compact, the inferior pair strongest ; colour blackish, tipped with a pale 
hue. 
Hab. Mexico, Teapa in ‘l'abasco (H. H. Smith). 
Lithyphantes lztus, sp. n. 
Adult male, length 13 lines. 
Cephalothorax considerably longer than broad, roundly truncate in front. Caput rather elevated in the ocular 
region, the anterior part of which is prominent; lateral marginal impressions very slight. Colour bright 
reddish-orange-yellow ; the surface, especially the sides of the caput, covered with minute granulosities 
and shallow roundish punctures or pock-marks. 
Eyes subequal, those of the lateral pairs larger than the rest, the fore-laterals largest ; the very slight curve of 
the posterior row is directed forwards, the strong curve of the anterior row also directed forwards. The 
four centrals form a quadrangle longer than broad, its anterior side perhaps a trifle longer than the 
posterior side. The fore-lateral pairs are separated by distinctly more than a diameter, and are seated on a 
strong tubercular prominence ; each is also about a diameter from the fore-lateral eye on its side; those 
of the lateral pairs are separated by a small interval, and are on strong tubercles, forming lines at right 
angles to the line of the posterior row. The hind-centrals are separated by distinctly less than a diameter, 
and each is nearly one and a half diameters from the hind-lateral eye on its side. The clypeus is much 
impressed above, and its height is considerably greater than the length (from back to front) of the 
ocular area. 
Legs moderately long, subequal, 4, 1, 2, 3, not very strong, coloured like the cephalothorax; femora very 
slightly granulose, furnished only with hairs. 
Palpi moderate in length, similar to the legs in colour, except the cubital and radial joints, which are suffused 
with dusky yellow-brown, digital joint deep brown. The humeral joint has a single longitudinal row 
of spine-like bristles on the outer side, with others rather stronger on the inner side; some small granu- 
losities also on the inner surface. The radial joint is greatly and roundly produced on the upperside 
forwards, with a submarginal series of strong spine-like bristles directed forwards. The digital joint is 
large, oval, and continues the form of the radial joint, of which (from the upperside) it almost appears 
to form a part; it is thickly covered with coarse bristles. The palpal organs are not very complex, with a 
strong corneous process at their fore extremity, from which there issues a long slender black spine, forming 
a large bold curve beneath on the outer side. 
Falces long, strong, especially the basal portion, the extremities being more tapering and strongly divergent ; 
they are of a dark reddish-orange-brown colour, and furnished with hairs and minute granulations 
in front. 
Mazxille long, strong, greatly inclined towards the labium, broadly and a little obliquely truncated at their 
outer, and pointed at the main, extremities. Their base is roundly protuberant, giving an oblique trans- 
verse general impression about the middle. ‘Their colour is similar to that of the falces. 
Labium large, broader than high, the apex rounded, sides nearly parallel; colour suffused with dusky blackish. 
Sternum heart-shaped, pointed at its hinder extremity, from which a kind of narrow, tapering, blackish ridge 
(looking like a slender spine) runs on between the posterior coxe. 
Abdomen oval, the connecting pedicle shielded by a strong circular ridge and socket, in connection with a large 
yellow-brown coriaceous area covering almost the whole of the anterior half of the underside of the 
