RUNCINIA. . 73 
the middle, the whole being spotted with minute whitish points and furnished with short pale bristles. 
The underside of the abdomen (as well as the sternum, maxille, labium, and palpi) is of a dull yellowish 
colour. The genital aperture is small and very inconspicuous, though of characteristic form. 
The male resembles the female in general colour and markings; but the cephalothorax, in the only example 
examined, has no pale oval marking at the thoracic junction, the whole being of a unicolorous yellow- 
brown hue. The palpi are short, similar in colour to the posterior legs; the radial joint is very short, 
shorter than the cubital, furnished with three spine-like bristles on the upperside, and with a rather long 
slightly tapering straight apophysis, longer than the joint itself, at its outer extremity (fitting up close to 
the outside of the digital joint), and slightly bifid at its point; the digital joint is narrow-oval, about 
equal in length to the radial and cubital together. The palpal organs are simple—an oval lobe surrounded 
by aslender paie pointed spine—and with a small pointed spine at their anterior extremity. The armature 
of the second pair of legs is stronger than in the female; but the spines are fewer in number—only three 
pairs, while in the female there are five pairs. 
Hab. GuateMALa, Chicoyoito (Sarg). 
Runcinia tibialis, sp. n. 
Adult male, length 13 lines. 
This species is of a very flattened form, short, and broad. 
The cephalothorax is distinctly broader than long, the caput very short, the thorax rounded on the sides ; its 
colour is bright red-brown suffused with blackish on the sides ; a clear, strongly defined, yellowish-white 
line running across the caput immediately in front of the posterior row of eyes. On the sides of the 
thorax, near the margin, are a few short spines springing from small tubercles, and there are also a 
few prominent spines on the ocular area and lower margin of the clypeus. The height of fire~elg perth is 
less than half that of the facial space, and its direction is vertical. 
The eyes are in the usual position. Those of the posterior row are very nearly equidistant from each other ; if 
anything, the interval between the two centrals is slightly the largest. The four centrals describe a 
trapezoid whose anterior side is shorter than the posterior, and the sides rather shorter than the anterior. 
The eyes of the anterior row are equidistant from each other, and its laterals are rather the largest of 
the eight. 
The legs are 2,1, 4,3. The first and second pairs are long and strong, the third and fourth pairs short 
and much smaller, The former have the femora, genus, and tibiw black-chestnut coloured, and the 
metatarsi and tarsi reddish-yellow-brown, becoming gradually paler towards the extremity. The 
femora, tibia, and genue of the first and second pairs are all unusually strong, but the tibie dispropor- 
tionately so. The femora are covered with small tubercular granulations, from which issue small spines, 
bristles, or hairs ; beneath the tibie are three pairs of strong spines and some coarse bristly hairs, and 
beneath the metatarsi are two pairs of spines. The third and fourth pairs are of a reddish-orange colour, 
furnished with hairs and bristles, but devoid of spines. 
The falces are rather short, conical, directed backwards, and similar in colour to the cephalothorax. 
The palpi are very short. The radial is shorter than the cubital joint, and has a strongish slightly tapering 
spine issuing from its outer side, with two other shorter spines on its inner side, its outer extremity 
being produced into a somewhat tapering apophysis as long as or longer than the joint itself, with its 
rather broad end extremity bifid or notched. The digital joint is of moderate size, oval, pointed at its 
extremity, furnished with bristles and one or two spines outside. The palpal organs are simple and 
encircled by a closely adhering black spine. . 
The abdomen is of a short-oval or somewhat quadrate form truncated in front; its colour is dull’ yellow- 
brown, the lateral margins, sides, four diffuse spots on the middle of the upperside, and some transverse 
lines or bars on the hinder half extending over the sides being deep chocolate-brown. 
The colour of the maxille, labium, and sternum is similar to that of the cephalothorax. 
Hab. Panama, Bugaba (Champion). 
BIOL. CENTR.-AMER., Arachn. Aran., April 1891. | Lf 
