108 ARANEIDEA. 
particular groups of forms differing in shape, colour, and structure, assignable to any 
well-defined continents or regions. 
The species apparently peculiar to the East—Ceylon, Sumatra, Java, Borneo, &c., 
since the giant forms are absent in these regions—are represented by closely allied 
forms both in South Africa and in tropical America. 
They inhabit the tract of country which lies within latitude 40° north and south 
of the Equator, though doubtless, under favourable conditions, species stray further, 
both north and south. In their habits they are apparently vagrant, wandering 
about over the foliage in the forest at night, somewhat as do the European Clubionids. 
The males seem to be met with less frequently than the females, and the egg-sac is 
attached to the underside of a stone or piece of bark and not carried about as in 
Lycoctenus and Cupiennius. No web is constructed, so far as I am aware, though 
possibly leaves may sometimes be woven together to form a retreat. 
Representatives of only two genera have hitherto occurred in Central America, 
which may be recognized as follows :— 
GENERA. 
i. Central posterior and lateral posterior eyes subequal. Central anteriors 
equal to, subequal, or only slightly smaller than central posteriors : 
not less than one-half. Lateral anteriors larger, their anterior 
margin forming with the anterior margin of the central posteriors 
a straight or procurving line. Scopula present. Lower margin of 
fang-groove with five unequal teeth . . . . . . . . . . . Crenus, Walck. 
ii. Central posterior eyes distinctly larger than the lateral posteriors. 
Central anteriors very much smaller than the central posteriors : 
one-third only. Lateral anteriors very minute, oblique; their 
anterior margin forming with the anterior margin of the central 
posteriors a recurved line. Scopula absent. Lower margin of 
fang-groove with five equal teeth. 2. . 2. 2. . 1.) .)06CLmrycuevus, E. Simon. 
CTENUS. 
Ctenus, Walckenaer, Tabl. des Aran. p. 18 (1805). 
Type C. dubius, Walck. Cayenne. 
The Central-American species of this genus known to me may be recognized as 
follows, but they are so closely allied and their characters so involved that it is 
difficult to furnish any thoroughly satisfactory tables :— 
Males. 
A. Carapace distinctly raised and gibbous at the base above, slightly 
bilobate. Tibia and tarsus of pedipalp without pad of soft hair on the 
inner side. (These characters fix the position of the Central-American 
species of Ctenus amongst those of the Neotropical region generally.) 
