Mr. J. Blackwall on new Species of Spiders. 203 
largest of the eight, and between these groups two round eyes 
are placed transversely. The legs are long, moderately robust, 
provided with hairs and spines, and are of a brownish-yellow 
colour, the tibie, metatarsi, and tarsi having a tinge of red; the 
first pair is the longest, then the fourth, and the third pair is 
the shortest ; each tarsus is terminated by three claws; the two 
superior ones are curved and pectinated, and the small inferior 
one is inflected, and has a few fine teeth at its base: the palpi 
are very long, and resemble the legs in colour; the radial nearly 
equals the humeral joint in length, and the short digital joint 
is terminated by the oval red-brown palpal organs, which have 
a prominent, spiral, dark red-brown spine at their extremity. 
The abdomen is oviform, clothed with hairs, slightly convex above, 
and projects a little over the base of the cephalothorax ; it is of 
a yellowish-brown colour, the under part being the palest. 
The immature female is rather darker-coloured than the adult 
male, and its legs are stronger and much shorter, but their 
relative length is the same; its palpi, which are comparatively 
short and robust, have the dark-brown digital joint terminated 
by a curved claw. 
It is very difficult to determine the position that the spiders of 
the genus Filistata should occupy in a systematic arrangement 
of the Araneidea. They possess few characteristics in common 
with the Mygalide, in which family they are usually placed by 
arachnologists. By the disposition of the eyes, the relative 
length of the legs, and the structure of the falces they are 
allied to the spiders of the genus Artema; but by their general 
structure and economy they appear to have the nearest affinity 
to the Drasside, and particularly to certain species of the genus 
Drassus. 
The adult male described above, and two immature females 
were captured in the island of Jamaica. 
Family Lycosip#. 
Genus Lycosa, Latr. 
Lycosa ingens. : 
Lycosa ingens, Blackw., Ann. & Mag. Nat. Hist. ser. 2. vol. xx. p. 284. 
The male is smaller than the female, but it resembles her in 
colour. Its palpi have a red-brown hue, and are clothed with 
greyish-brown hairs, the digital joint, which is the darkest, 
having a few white hairs at its base; the radial is larger than 
the cubital joint, and has some white hairs at its extremity ; 
the digital joint is of an oblong-oval figure, slightly convex 
above, compact at the extremity, which is provided with several 
strong spines, and has a concavity at its base, on the underside, 
14* 
