228 ARANEIDEA. 
Mazxille long, strong, rather divergent, and greatly dilated at the fore extremity, where they are furnished 
with a conspicuous tuft of divergent bristly hairs. 
Labium rather more than half the length of the maxille, and longer than broad, rather deeply notched at the 
apex, the sides from a little way above the base (where there is a slight indentation or constriction) 
flange-like. 
Sternum regular, oval, much longer than broad, pointed behind. 
Abdomen long, narrow, tapering to the spinners, with a transverse slit or opening on the underside nearer to 
the fore than to the hinder extremity, and no doubt leading to a spiracular organ. It is of a pale yellow 
hue, clothed with fine pale silky hairs. The superior spinners are rather long and slender, the inferior 
much shorter and stronger. 
The female closely resembles the male in colours and general characters, and the genital aperture is very 
characteristic in form. 
Hab. Panama, Veraguas (Boucard). 
This genus is closely allied to Anyphena, from which it may, however, be distin- 
guished at once by the transverse spiracular opening on the underside of the abdomen 
being in advance of the middle, whereas in Anyphena it is at the middle. 
CHIRACANTHIUM, C. L. Koch. 
Chiracanthium ferum, sp. n. 
Adult male, length very nearly 4 lines. 
General form and structure normal. 
Cephalothorax pale dull orange-yellow ; height of the clypeus rather less than the diameter of one of the fore- 
central eyes. 
Eyes very nearly equal in size ; anterior row nearly straight, the convexity of the slight curve, if any, directed 
forwards; posterior row curved, but not strongly, the convexity directed backwards. Central quadrangle 
slightly broader than long, the fore side a little the shortest. The interval between the hind-centrals is 
equal to two diameters, and is slightly greater than that between each and the hind-lateral next to it, 
and the same relative position obtains with the eyes of the anterior row; those of each lateral pair 
are near together, but not contiguous. 
Legs long, 1, 4, 2, 3, moderately strong, furnished with long hairs and spines. Colour yellow. The tarsi 
each with a compact claw-tuft and a scopula beneath them. 
Palpi moderate in length and strength, similar to the legs in colour. Radial joint half as long again as the 
cubital, clothed above and below with long bristly hairs ; rather prominent underneath at the fore end ; 
at the fore extremity on the outer side is a rather long, strong, obtusely-pointed, tapering, slightly bent 
apophysis, half as long as the joint, and directed forwards, its fore half in close proximity to the base of 
the digital joint. This latter joint is large, thickly clothed with hairs, oval, and produced at its fore 
extremity; at its base on the outer side it has a prominent lobe, with a sinuous corneous margin or 
bordering spine, and is also produced at its base on the inner side; the outer corner of the digital joint 
terminates in a strong, tapering, slightly curved, sharp-pointed spine, directed backwards, close to the 
radial apophysis, and reaching a little way over the fore end of the radial joint. Palpal organs placed 
chiefly beneath the posterior half of the joint, rather prominent, compact, not very complex, with a 
tapering, pointed spine curving round their base from the outer to the inner side. 
Falces long, nearly or quite three-fourths the length of the cephalothorax, projected a little forwards, tapering, 
straight ; they are strongly cut away at their extremity on the inner side and furnished with numerous 
strong bristly hairs. Colour deep reddish-brown and glossy. 
Mawille yellow at the base, deep brown above. 
Labium dark brown. 
Sternum yellow, suffused forwards with yellow-brown. 
Abdomen oval, dull greenish-yellow. Spinners short, compact, of equal length, the inferior pair strongest. 
Hab. Mexico, Ciudad in Durango (forrer). 
