SALTICIDA. 167 
members of the Lycoside, but creep, run, and leap, often many times their own length, 
either to escape from a foe or to secure their prey. 
Otherwise, the position of the eyes is characteristic. ‘They are arranged usually 
in three rows (four in the group Lyssomanee) of 4—2—2. The centrals of the 
first row are the largest; the posterior centrals and the anterior laterals are about 
the same size; while the posterior centrals, referred to in the following descriptions as 
the small dorsal eyes, or simply the small eyes, are always the smallest of the group. 
In their other characters these spiders approach the members of the immense group 
including the Drasside, Clubionide, &c. The task of dividing up the enormous 
number of species, themselves very closely allied, into natural and convenient generic 
groups is not more easy in this family than in most of the others. Scarcely any 
character, or group of characters, which may be selected is really reliable, for although 
the species arrange themselves naturally into groups readily recognizable in a general 
way, yet when one endeavours to define their distinctive peculiarities, it becomes 
practically almost impossible to do so on account of intermediate forms. 
But though the grouping of species into natural and convenient genera is difficult, 
yet the species are themselves, in most cases, perfectly distinct. ‘he palpal organs of 
the male are usually well developed and furnish many useful characters, while the 
same may be said of the vulva of the female. 
Though even these portions of the structure vary slightly in individuals, yet the 
general plan in the various species is quite distinct and different. Nor can there be 
much doubt that the characters furnished by the disposition of the various clusters of 
hairs and scales forming the patterns on the carapace and abdomen would, in well- 
preserved examples, furnish reliable distinctions both specific and generic. 
The species represented in Central America may be placed, for convenience, in two 
subfamilies :-— 
A. Abdomen pediculate, more or less separated from the carapace on a distinct 
chitinized pedicle, admitting of free movement. Carapace, in some genera, 
very much constricted in the middle, in others not at all; the abdomen always 
more or less constricted. ‘Legs in the first two groups very slender, subequal ; 
in the third group, i. ori. and ii. more or less incrassate ; usually also very 
much less spinose . See ee ee ee ee TOXxEINné. 
B. Abdomen not separated by a chitinized pedicle. Neither carapace nor abdomen 
constricted in the middle. Legs, especially i. and ii., usually much stouter and ; 
more spinose . . . ww we ee ee ee ee ee ee.) SALPICINAL 
Subfam. TOXEINA. 
The members of this subfamily may in a general way be recognized by their 
resemblance, both in contour and in mode of action, to various kinds of Hymenoptera, 
a resemblance due chiefly to the constriction of the carapace or abdomen, and the 
