SYNAMA.—DILAA. 241 
SYN AEMA, Simon. 
Synzma polita, sp. n. 
Adult male, length 13 tol § lines; adult female, length 2 lines. 
Male.—Cephalothorax tolerably convex above, the profile line from the posterior extremity to the upper edge 
of the clypeus forming a strong, even curve; normal grooves and indentations almost obsolete. Surface 
smooth ; furnished with a few long, strong, prominent bristles. Colour deep rich blackish-brown. Height 
of clypeus equal to about half the distance between the fore-central and hind-central pairs of eyes. 
Eyes on pale yellow-brown tubercles, occupying nearly the whole width of the caput. The four central ones 
form, as nearly as possible, a square (if anything slightly longer than wide) whose fore side is a little, 
but distinctly shortest ; the space between the fore-centrals is rather greater than that between each and 
the fore-lateral next to it. The fore-laterals are largest, the hind-centrals smallest. Both rows have 
the convexity of their curve directed forwards. The curve of the front row is strongest. The intervals 
between the eyes of the posterior row are equal. 
Legs long, moderately strong, 2, 1, 4,3; 2 and 1 scarcely differ in length ; all the joints, excepting the tarsi, 
pretty numerously and strongly spinose. First and second pairs deep blackish-brown, the tarsi and 
metatarsi yellow, the tibie with a dull orange-yellow annulus near the hinder extremity. Third and fourth 
pairs much shortest and of a uniform yellow, perhaps slightly tinged with dull orange. 
Palpi short, yellow, digital joint slightly tinged with brown ; furnished with bristles and bristly hairs. Cubital 
and radial joints short and of equal length; the latter has at its extremity on the outer side a small, 
prominent, tapering, slightly curved apophysis; the digital joint is oval, of moderate size, its length equal 
to that of the radial and cubital joints together. The palpal organs are very simple, consisting of a 
flattish round corneous lobe, around which is coiled a long, closely fitting, tapering black spine issuing 
from near the base on the outer side. 
Falces moderate in length and strength, subconical, and of a deep brown colour. 
Mazille, labium, and sternum yellowish-brown. 
Abdomen short-oval, the upperside covered with a shining, polished, deep black-brown coriaceous plate, 
furnished with a few prominent bristly hairs; sides longitudinally rugose; the underside of a dark brown 
colour. 
The female (which, notwithstanding its remarkable difference of colour, I believe to be of the same species as 
the male above described) has the cephalothorax yellow-brown, the ocular area a little, and the sides 
much darker ; the legs of the first and second pairs dark yellow-brown, with the tarsi and metatarsi and an 
annulus near the base of the tibie yellow; the third and fourth pairs uniform yellow. The abdomen is 
subtriangular, the hinder part much the widest, the angles strongly rounded ; the upperside is dull white, 
with very faint grey traces of the normal Thomisid pattern, and a few prominent brown strong bristles ; 
the sides and underside dull uniform sooty-brown. The genital aperture is small and indistinct, but 
characteristic. 
Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith). 
DLZEA, Thorell. 
Diza spinigera, sp. n. 
Adult male, length 14 lines. 
General form and structure normal. The whole spider (legs, palpi, cephalothorax, and abdomen) is furnished 
with strong, prominent, black spines issuing from minute tubercles ; those on the fore and hinder parts of 
the cephalothorax, the abdomen, and the upperside of the first and second pairs of legs being the longest 
and strongest. Cephalothorax yellow, slightly tinged with orange, and with an irregular broken yellow- 
brown longitudinal hand along the upper part of each side. 
Eyes small, on strongish, subconical, whitish tubercles. The fore-laterals slightly largest. The interval 
between the hind-centrals is distinctly less than that between each and the hind-lateral eye on its side, 
and that between the fore-centrals is very slightly greater than between each and the fore-lateral next to 
it. The four central eyes form a quadrangle whose length is greater than its breadth and its posterior 
BIOL. CENTR.-AMER., Arachn. Aran., April 1898. 2 If 
