XV CLASSIFICATION 419 
generic name is really inapplicable, as there are eight eyes, but 
the anterior laterals are much reduced. The abdomen is long, 
and the legs are long and unequal, the first pair much the 
longest and the third much the shortest. 
Fam. 35. Oxyopidae.—The Oxyopidae form a well-marked 
group, with oval cephalothorax somewhat narrowed in front, and 
lanceolate abdomen. The eight black eyes have a characteristic 
arrangement, and the anterior medians are always very small. 
The legs are long and tapering, and not very unequal, and are 
furnished with particularly long spines, which give these spiders 
a very characteristic appearance. There are eight genera, of 
which the most important are Pucetia and Oxyopes. 
Pucetia contains a number of rather large spiders, generally 
bright green, often variegated with red. They affect particular 
plants. For instance, P. viridis, which occurs in Spain, is always 
found on Ononis hispanica. There are about thirty species of 
this genus distributed over the tropical and sub-tropical regions 
of the world. Oxyopes numbers many species, certainly more 
than fifty, and has a similar distribution, but some of its members 
invade colder regions. They are of rather small size. 0. lineatus 
is a very rare spider in the south of England. 
The Oxyopidae are diurnal spiders, running over plants in 
search of prey, and often leaping, after the fashion of members of 
the following family. 
Fam. 36. Attidae (Salticidae).— Wandering spiders with 
cephalothorax broad anteriorly, and bearing eight homogeneous eyes 
in three rows. Four eyes, largely developed, are directed forward ; 
the remaining four eyes are placed dorsally in two rows, the first 
pair being much reduced in size. 
The Attidae or Jumping-spiders form the most extensive 
family of the whole order, the known species amounting to 
something like four thousand. It is only of late years that 
their vast numbers have begun to be realised, for their vagabond 
habits and great activity enabled them to a great extent to elude 
the earlier collectors, whose methods were not as thorough as 
those now in vogue. Their real home is in the tropical regions, 
temperate fauna being comparatively poor in Attid species. 
France boasts nearly 150, but only 37 are recorded for the 
British Isles, and 2 at least of these are recent introductions. 
Some of the tropical forms are most brilliantly coloured, 
